quadgram

This is a table of type quadgram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

quadgram	frequency
a genus of microscopic	109
genus of microscopic foraminifera	108
a genus composed of	89
family of the order	46
is said to be	42
composed of species of	37
genus composed of species	37
are found in the	35
two in each valve	33
low water to fathoms	30
published at l s	30
this family contains the	28
in a fossil state	27
on account of the	27
of the body whorl	26
the base of the	26
part of the body	23
species are found in	23
family contains the genera	22
the centre of the	21
a family belonging to	21
of the outer lip	21
the shells of this	21
a term applied to	21
muscular impressions two in	21
impressions two in each	21
family belonging to the	20
in the system of	20
a family of the	19
the back of the	19
the edge of the	18
teeth in each valve	18
section of the order	18
on each side of	18
the greater part of	18
which are described as	18
of a bivalve shell	18
at the base of	17
the first section of	17
folds on the columella	17
east and west indies	17
edge of the aperture	17
each side of the	17
by the last whorl	17
part of the shell	17
the second family of	16
of the order conchifera	16
shells of the genus	16
shells composing this genus	16
it is said to	16
the order conchifera dimyaria	16
the margin of the	15
and other similar species	15
is found in the	15
so as to form	15
the surface of the	15
by means of a	15
are said to be	15
the body of the	15
from low water to	15
fossil species are found	14
of those species of	14
the shells composing this	14
tooth in each valve	14
of the order trachelipoda	13
the shells of which	13
shells of this family	13
shells of this genus	13
inner lip spread over	12
may be known from	12
divided into the families	12
of which are described	12
shells of which are	12
the sides of the	12
as to form a	12
the first family of	12
containing the following genera	12
the recent species are	12
shell is said to	12
the edges of the	12
of this genus are	12
the fossil species are	12
of the shell is	12
margin of the shell	12
known in a fossil	12
composing this genus are	11
first section of the	11
consisting of few whorls	11
part of the genus	11
with the outer lip	11
a portion of the	11
second family of the	11
fossil species occur in	11
species of this genus	11
for the reception of	11
order of the class	11
only known in a	11
part of the aperture	11
a genus of small	11
side of the umbones	11
the head of the	11
view of the same	11
terminating anteriorly in a	11
in the centre of	11
the upper part of	11
described as having the	10
the first order of	10
belonging to the first	10
to the first section	10
a great number of	10
contained in this family	10
they are said to	10
of the genus helix	10
in the family of	10
a genus consisting of	10
upper part of the	10
may be known by	10
the form of a	10
in this family are	10
in the outer lip	10
the third family of	10
the shells belonging to	10
may be thus distinguished	10
genus composed of those	10
of a series of	10
this genus differs from	10
division of the genus	10
of this family are	10
this genus is known	10
modified by the last	10
the name of the	9
the lower part of	9
a genus formed for	9
in the british museum	9
is divided into the	9
the second section of	9
inner and outer lips	9
palleal impression with a	9
greater part of the	9
in some species of	9
surface of the shell	9
genus of the family	9
for the purpose of	9
it contains the genera	9
term applied to the	9
first family of the	9
head of the animal	9
the passage of a	9
cardinal teeth in each	9
a genus of the	9
composed of those species	9
genus is distinguished from	9
by de blainville in	9
hinge with two cardinal	9
with the exception of	9
in the lower valve	9
be found in the	9
which it differs in	9
in the palleal impression	9
the appearance of a	9
for the passage of	9
this genus is distinguished	9
species of the genus	9
the shells of the	9
teeth on the hinge	9
over part of the	9
from which it differs	9
a genus formed of	8
the number of species	8
a division of the	8
lip spread over a	8
to be found in	8
of the inner lip	8
the inner and outer	8
as distinguished from the	8
genus formed for the	8
one in each valve	8
that there is no	8
consisting of numerous whorls	8
impression of the mantle	8
is one of the	8
are remarkable for the	8
near the centre of	8
two cardinal teeth in	8
under the name of	8
the last of which	8
one of the most	8
spread over a portion	8
in the form of	8
the apex of the	8
will be found in	8
the direction of the	8
the characters of the	8
it will be necessary	8
over a portion of	8
the foot of the	8
they are divided into	8
placed by de blainville	8
with a large sinus	8
a genus described as	8
one side of the	8
contains the following genera	8
the rest of the	8
it is difficult to	8
this is the case	8
formed for the reception	8
the second order of	8
on the back of	7
of the same species	7
of the last whorl	7
sinus in the palleal	7
be known by the	7
the interior of the	7
the whole of the	7
genus is known from	7
the aperture of the	7
covered with an epidermis	7
to the family of	7
distinguish this genus from	7
cardinal tooth in each	7
body of the animal	7
part of a shell	7
there is but one	7
the whole length of	7
with a series of	7
found in the tertiary	7
of the muscular impression	7
impressions one in each	7
that part of the	7
with two cardinal teeth	7
brought to this country	7
in the hinge of	7
the inner surface of	7
section of paracephalophora monoica	7
base of the shell	7
on the hinge of	7
lateral teeth in each	7
impression with a large	7
the fourth family of	7
at the anterior extremity	7
back of the shell	7
the third order of	7
in the case of	7
its name from the	7
passage of a byssus	7
portion of the body	7
the anterior of the	7
a part of the	7
impressions in each valve	7
beds of this age	7
described as differing from	7
when the valves are	7
lower part of the	7
will be necessary to	7
are several fossil species	7
the east and west	7
the system of lamarck	7
on account of its	7
belonging to the order	7
it is found in	7
in such a manner	7
consisting of those species	7
muscular impressions one in	7
on one side of	7
it is necessary to	7
then said to be	7
of the order gasteropoda	7
part of the whorls	7
of the order lamellibranchiata	7
has been divided into	7
there are several fossil	7
a genus separated from	7
from the indian ocean	7
side of the shell	7
teeth in one valve	7
of the shell in	6
of the conchological illustrations	6
by side in a	6
to the study of	6
found in london clay	6
the manner in which	6
as long as the	6
one on each side	6
very variable in form	6
this term is applied	6
the outer lip is	6
consisting of four valves	6
are divided into two	6
anterior part of the	6
in which they are	6
are described as having	6
this country by mr	6
on the surface of	6
foot of the animal	6
at a distance from	6
this genus has been	6
the following genera of	6
various parts of the	6
the system of de	6
growth of the shell	6
the isle of wight	6
side by side in	6
into the following families	6
anterior of the aperture	6
and two lateral teeth	6
side in a circle	6
the growth of the	6
the size of the	6
to shells of the	6
valves of which are	6
family contains the following	6
on the upper part	6
open at both ends	6
the greater number of	6
in a young state	6
to which it is	6
temperate and tropical climates	6
the point of the	6
there are several species	6
the apex or nucleus	6
it is described as	6
described by de blainville	6
a more or less	6
rest of the shell	6
gaping at both extremities	6
of a spiral shell	6
contiguous to the axis	6
included in the genus	6
the mouth of the	6
figures and descriptions of	6
the posterior part of	6
which are found in	6
to this country by	6
in the tertiary beds	6
of this genus is	6
fold on the columella	6
the type of this	6
to be seen in	6
the outer lip of	6
system of de blainville	6
body of the shell	6
the valves of which	6
are distinguished by the	6
published by the author	6
only in a fossil	6
at the lower part	6
of the other valve	6
is only known in	6
whole length of the	6
are brought from the	6
tooth in one valve	6
of a single piece	6
the hinge of the	6
in various parts of	6
soft parts of the	6
a genus proposed to	6
under the generic name	6
the top of the	6
for the most part	6
on the shores of	6
posterior part of the	6
has the power of	6
the soft parts of	6
a resemblance to the	6
of the genus trochus	5
the fossil species occur	5
teeth on each side	5
the anterior part of	5
order is divided into	5
parts of the animal	5
of those species which	5
divided into the following	5
is a pretty shell	5
of the aperture of	5
have been found in	5
genus of small shells	5
shells contained in this	5
the nearest approach to	5
the want of a	5
in the latter genus	5
outer lip slightly thickened	5
this well known genus	5
is a genus of	5
centre of the shell	5
belong to tropical climates	5
the lines of growth	5
type of this genus	5
on the inner edge	5
the posterior side of	5
the suture of the	5
a great variety of	5
family of polythalamous cephalopoda	5
of four valves in	5
a series of small	5
by de blainville as	5
length of the shell	5
it is impossible to	5
which in the latter	5
some of the most	5
the case with the	5
outer lip thickened within	5
found in a fossil	5
are to be found	5
shells belonging to this	5
of the shells of	5
it will be found	5
umbones separated by a	5
the structure of the	5
it comes from the	5
habits of the animal	5
of the class mollusca	5
a few fossil species	5
of some bivalve shells	5
the notch in the	5
the side of the	5
over the body whorl	5
the aperture of a	5
attached by the whole	5
of an univalve shell	5
composed of numerous whorls	5
of the latter is	5
the outer surface of	5
is composed of a	5
the nature of the	5
in a straight line	5
in the first instance	5
sides of the umbones	5
this is the only	5
in which it is	5
belonging to the family	5
is the same as	5
one of which is	5
is to be seen	5
from the apex to	5
only two or three	5
fossil species are known	5
a byssus passing through	5
muscular impressions in each	5
genus are found in	5
two or three species	5
most of the species	5
structure of the shell	5
to which may be	5
the outside of the	5
axis of the shell	5
by which it is	5
by the whole length	5
from the body whorl	5
genus of land shells	5
in the number of	5
the species are very	5
over the back of	5
of the isle of	5
forms part of the	5
the principal part of	5
aperture of the shell	5
explanation of figures to	5
hinge of one valve	5
the substance of the	5
of which there are	5
they are found in	5
suture of the spire	5
the bottom of the	5
the study of the	5
distinguished from the true	5
of the lower valve	5
on account of their	5
found in the mediterranean	5
at the posterior extremity	5
number of species is	5
base of the pillar	5
and the inner lip	5
of the columellar lip	5
extremity of the aperture	5
the exception of the	5
a genus of shells	5
which may be added	5
pit in the hinge	5
those of the genus	5
as in the case	5
two lateral teeth in	5
the greatest distance from	5
they are described as	5
inner surface of the	5
is that part of	5
the genera may be	5
first order of the	5
base of the aperture	5
corresponding with the genus	5
where the head of	5
the plates beautifully coloured	5
the apex to the	5
the habits of the	5
sides of the shell	5
parts of the world	5
of a species of	5
is distinguished by the	5
to each other in	5
in a short canal	5
recent species are found	5
both sides of the	5
is the case with	5
divided into chambers by	5
at the greatest distance	5
consisting of species with	5
apex of the spire	5
in others it is	5
is a rare and	5
one species is known	5
new species were brought	4
by a series of	4
from the outer lip	4
through a hole in	4
it will be observed	4
the roots of the	4
from the seas of	4
the point of a	4
of the first section	4
impression in each valve	4
posterior side of the	4
an hiatus in the	4
found in the british	4
this family may be	4
by the number of	4
reflected over part of	4
in the shells of	4
only one species is	4
of the second section	4
a genus founded on	4
composed of two pieces	4
outer lip thickened and	4
seas of new holland	4
separated under the name	4
is found on the	4
of the family of	4
of some of the	4
species were brought to	4
to the size of	4
the cast of a	4
as in the nautilus	4
is a common species	4
this is a genus	4
of all the species	4
of a spiral univalve	4
term applied to a	4
that it is difficult	4
fourth family of the	4
on the opposite side	4
is contained in a	4
on the inner surface	4
a shell is said	4
composed of a single	4
of the animal lies	4
a common name given	4
the only genus of	4
greatest distance from the	4
an example of the	4
part of the work	4
genus of sessile cirripedes	4
greater part of these	4
at the sides of	4
a sinus in the	4
a generic name proposed	4
third order of the	4
the term is applied	4
by the thickness of	4
the notch at the	4
it differs in the	4
genus proposed to include	4
from this genus by	4
applied to any shell	4
and is divided into	4
to that of the	4
term is applied to	4
are among the most	4
terminating in a point	4
so as to present	4
belonging to it are	4
with a number of	4
only on one side	4
the absence of the	4
passing through a hole	4
at the edge of	4
from which they are	4
be seen in the	4
palleal impression not sinuated	4
brought from the east	4
extremity of the shell	4
of the class acephalophora	4
with the plates beautifully	4
is that which is	4
to which they are	4
of the order monopleurobranchiata	4
at the bottom of	4
in the first section	4
species are very numerous	4
the centre of each	4
it is divided into	4
having a series of	4
is no danger of	4
on the inner lip	4
principal part of the	4
is to be found	4
portion of the shell	4
example of the genus	4
this order is divided	4
as the apex of	4
palleal impression having a	4
from the east indies	4
and the shell is	4
species are not numerous	4
on the edge of	4
in the left valve	4
be distinguished by the	4
the body whorl and	4
in some parts of	4
it are described as	4
this genus are found	4
in the skin of	4
each other in a	4
second section of the	4
part of the outer	4
all the species hitherto	4
nearly allied to the	4
the seas of new	4
closed by an operculum	4
genus derives its name	4
used to express the	4
of the spiral cone	4
of several species of	4
from side to side	4
the place where the	4
in the seas of	4
hinder part of the	4
place in the system	4
in the isle of	4
of the aperture is	4
is then said to	4
you will find it	4
the plants on which	4
known by the name	4
no danger of confounding	4
the umbo of the	4
with a kind of	4
as in some species	4
the largest of the	4
by de blainville to	4
at the head of	4
known only in a	4
which this genus is	4
from the indian seas	4
edge of the whorls	4
genus composed of the	4
it is called the	4
over a part of	4
one in the other	4
some small species are	4
a series of teeth	4
the umbones in each	4
a bivalve shell is	4
the point of union	4
the thinness of the	4
umbones in each valve	4
of the contents of	4
a pair of forceps	4
in the greater number	4
at the top of	4
those species which have	4
by the absence of	4
apex to the base	4
another view of the	4
is remarkable for the	4
spread over part of	4
valve of the shell	4
close to the canal	4
with a very short	4
to the apex of	4
in london clay and	4
side of the aperture	4
the character of the	4
the genera contained in	4
indicated by the letter	4
common name given to	4
at the anterior part	4
the position of the	4
this family are described	4
be distinguished as follows	4
second section of paracephalophora	4
centre of each valve	4
radiating from the umbones	4
shells are said to	4
natural history of the	4
a distance from the	4
they will be found	4
genus has been divided	4
the hinder part of	4
lateral tooth in each	4
genera may be thus	4
the anterior and posterior	4
may be distinguished as	4
serves the purpose of	4
family are described as	4
substance of the shell	4
the latter of which	4
were brought to this	4
second order of the	4
be described as a	4
valves of a shell	4
there is no danger	4
four valves in pairs	4
for the first time	4
on both sides of	4
such a manner that	4
the posterior muscular impression	4
from its resemblance to	4
back of the animal	4
genera contained in this	4
is a fine shell	4
will be observed that	4
composed of four valves	4
at the same time	4
in the explanation of	4
the front of the	4
composed of a series	4
those species which are	4
the muscular impression of	4
is also applied to	4
bivalves belonging to the	4
to distinguish this genus	4
shells belonging to it	4
of the whorls being	4
canal at each extremity	4
described as having a	4
closed at one end	4
separated on account of	4
but also in the	4
the form of the	4
with regard to the	4
notch at the anterior	4
containing no genera of	4
cardinal and two lateral	4
confounded with any other	4
to it are described	4
consisting of species of	4
few fossil species are	4
the thickness of the	4
of a univalve shell	4
occur in the tertiary	4
centre of the hinge	4
the extremity of the	4
two muscular impressions in	4
more properly to the	4
the isle of france	4
the anterior extremity of	4
state of the science	4
of species of ammonites	4
ribs radiating from the	3
the manner of tiles	3
of the notch at	3
the outer lip thickened	3
some of the beds	3
more ventricose than the	3
shells composing this well	3
the ligamentary pit in	3
with three or four	3
a genus of fossil	3
genus consisting of a	3
as well as the	3
the dorsal part of	3
first section of paracephalophora	3
which have but one	3
in the rock pools	3
means of a byssus	3
are examples of this	3
attached by a byssus	3
conchological illustrations by the	3
placed in the family	3
the shape of the	3
as well as in	3
is easily distinguished from	3
do not touch each	3
the anterior termination of	3
term used to express	3
belongs to this genus	3
in explanation of figures	3
apex of the shell	3
coasts of the pacific	3
being attached by the	3
of the genus unio	3
and corresponding with the	3
it may be observed	3
is to be observed	3
hidden by the last	3
suddenly over the back	3
has the appearance of	3
operculum consisting of four	3
species which have a	3
at the base by	3
by sir william jackson	3
a series of sandstones	3
have been considered as	3
union with the outer	3
which have the outer	3
a bivalve shell when	3
is attached to the	3
is a foreign genus	3
terminating in a short	3
a genus belonging to	3
at the dorsal margin	3
to those species of	3
edges of the successive	3
with the anterior side	3
is difficult to distinguish	3
spiral at the apex	3
to the body whorl	3
inner lip of the	3
the folds on the	3
spread over a part	3
a fissure near the	3
that of the other	3
two rows of varices	3
towards the posterior margin	3
no genera of testaceous	3
the shell is said	3
notch in the aperture	3
often to be found	3
lip of the aperture	3
have the appearance of	3
of histoire naturelle des	3
differ from the true	3
remote from the umbones	3
the upper edges of	3
are included in the	3
tooth on the hinge	3
the valves are closed	3
the regularity of the	3
shell when it is	3
of most of the	3
the seventh family of	3
the typical species of	3
class of invertebrated animals	3
genera of testaceous mollusca	3
of which only one	3
by those who have	3
great number of species	3
the genera belonging to	3
which only one species	3
is then described as	3
few fossil species occur	3
hinge with three cardinal	3
acquaintance with the subject	3
at the back of	3
are attached by the	3
represented in the plates	3
of species of serpula	3
byssus passing through a	3
that they are all	3
by a byssus passing	3
denticulated on the inner	3
which the shells are	3
characters of the genus	3
to admit the passage	3
into a kind of	3
of which it is	3
of the external surface	3
lateral one on each	3
to be met with	3
as far as they	3
is divided into separate	3
to the second section	3
two cardinal and two	3
species are natives of	3
passing through the lower	3
and are represented in	3
is applied to the	3
a number of small	3
and that it is	3
of the remains of	3
in his genera of	3
the remainder of the	3
said to be compressed	3
it consists of a	3
been separated on account	3
umbones of a bivalve	3
the sixth family of	3
an univalve shell is	3
of a filament of	3
floor of the pit	3
of the first genus	3
divided into three orders	3
are covered with an	3
and simple in form	3
on which they feed	3
in the next family	3
although the animal is	3
placed at a distance	3
covered with a greenish	3
consisting of one or	3
on the dorsal margin	3
edges of the whorls	3
the successive layers are	3
it with any other	3
are found on the	3
are only known in	3
edge of the outer	3
the plants of the	3
from the east and	3
its name from its	3
example of this is	3
will be found that	3
together side by side	3
to include those species	3
the inner lip is	3
in temperate and tropical	3
a slit near the	3
the shells contained in	3
species at present known	3
the species of this	3
this genus of land	3
which are figured in	3
and contains the genera	3
from time to time	3
genus described as differing	3
to the foot of	3
is an example of	3
a genus founded upon	3
plaits on the columella	3
it differs in having	3
for shells of the	3
the whorls of which	3
have the power of	3
are then said to	3
turned suddenly over the	3
through the lower valve	3
is a fossil genus	3
in some of the	3
to marine substances by	3
which have the spire	3
to be observed in	3
cape of good hope	3
the axis of the	3
of the british museum	3
more or less globular	3
of the bivalve shells	3
this genus is composed	3
third family of the	3
the cavity of the	3
teeth in the aperture	3
in holes of rocks	3
the shell and the	3
the shells are described	3
introduction to the study	3
have been placed in	3
two of which are	3
found in great britain	3
lip spread over the	3
is figured in the	3
species belong to tropical	3
outer lip with one	3
to the genus helix	3
operculum of four valves	3
surface of the water	3
into corresponding cavities in	3
coloured plates by sowerby	3
bores and inhabits stone	3
illustrations by the author	3
of few rapidly increasing	3
no fossil species are	3
near the posterior muscular	3
belonging to the second	3
in the london clay	3
the teeth on the	3
margin of a bivalve	3
has divided this genus	3
diverging cardinal teeth in	3
bivalve is said to	3
taking its name from	3
it serves the purpose	3
of a shell is	3
covered with a thin	3
many of the species	3
manner in which the	3
two british species of	3
on the coasts of	3
in the contrary case	3
shells are found in	3
to the inner surface	3
hinge consisting of a	3
from all other shells	3
is said to have	3
his genera of shells	3
of the adductor muscles	3
it forms part of	3
are known from the	3
of which is represented	3
give you an idea	3
beyond the reach of	3
hinge of the same	3
of the shell are	3
the animal has a	3
you an idea of	3
by the notch in	3
the end of the	3
so named from its	3
admit the passage of	3
are more or less	3
placed against each other	3
of two or more	3
are attached by a	3
when the whorls are	3
be indicated by the	3
be seen when the	3
fulcrum of the ligament	3
of a deep red	3
is found on our	3
is furnished with a	3
of small shells resembling	3
of one of the	3
it is to be	3
a small portion of	3
series of small teeth	3
of the genus dentalium	3
high and low water	3
body whorl and the	3
genera enumerated in explanation	3
by the insertion of	3
of the hinge line	3
the situations in which	3
of the inner surface	3
alphabetical part of the	3
hiatus in the ventral	3
to the margin of	3
distant from each other	3
an operculum of four	3
whorls of the spire	3
as having the ligament	3
in which there is	3
with a single tooth	3
cartilage placed in a	3
and one remote lateral	3
in the right valve	3
is commonly called the	3
we find that the	3
is a large genus	3
upon a prominent fulcrum	3
when the animal is	3
at the extremity of	3
in a slight emargination	3
recent species of this	3
divided into two groups	3
covered with an olive	3
of confounding it with	3
layer of shelly matter	3
the same may be	3
a canal at each	3
those species of chiton	3
this genus differ from	3
shells belonging to the	3
a tendon passing through	3
you are already acquainted	3
the natural position of	3
animals which produce them	3
and is said to	3
composed of two or	3
the genus voluta of	3
for separating this genus	3
between high and low	3
in the neighbourhood of	3
to justify the separation	3
near the cardinal teeth	3
and one on the	3
author of this manual	3
the author of this	3
to each other by	3
be observed in the	3
the study of shells	3
are placed at a	3
specimen of which is	3
on the british shores	3
shell on which the	3
to breathe the air	3
those species of mitra	3
attached by the point	3
applied generally to any	3
nearly as long as	3
from front to back	3
compare them with the	3
the muscular impression is	3
with two muscular impressions	3
shells are described as	3
the fact that the	3
would be more properly	3
in some degree resembling	3
is not the case	3
genus is known only	3
here and there a	3
with here and there	3
species found in the	3
as a specific name	3
from beneath the umbones	3
part of the animal	3
which is only known	3
only genus of sessile	3
part of the hinge	3
beyond that of the	3
the apex of a	3
of carbonate of lime	3
substance passing through a	3
which is found in	3
the name given to	3
surface of the body	3
of which will be	3
on the other hand	3
tube closed at one	3
the whorls of the	3
anterior extremity of the	3
species occur in the	3
of the shell by	3
by a tendon passing	3
each other in the	3
on our own shores	3
the full natural size	3
interruption of the muscular	3
in the other valve	3
is nearest to the	3
few rapidly increasing whorls	3
belonging to this genus	3
british channel and mediterranean	3
which it is attached	3
secretion of the animal	3
in distinction from the	3
direction of the whorls	3
placed in this family	3
what a number of	3
genus in the family	3
on our own coasts	3
the common name for	3
other genera enumerated in	3
spread over the body	3
several fossil species of	3
an examination of the	3
corresponding cavities in the	3
surface of the sea	3
the width of the	3
is the only genus	3
like the rest of	3
an example of this	3
external view of the	3
spire of an univalve	3
upper edges of the	3
also applied to the	3
which is nearest to	3
many new species were	3
in the tertiary deposits	3
it is advisable to	3
it may be known	3
thickness of the shell	3
belong to the northern	3
in the structure of	3
remote lateral teeth in	3
the sutures of the	3
the valves of a	3
the direction in which	3
family of the class	3
valve of the same	3
to the present time	3
and there is a	3
of the indian ocean	3
found in the seas	3
will serve as an	3
by the name of	3
part of the whorl	3
index of british shells	3
found on our coasts	3
or figures and descriptions	3
in the same way	3
one species of this	3
of the larger valve	3
the greater number are	3
which are characterized by	3
canal at the base	3
in a great number	3
in the zoological journal	3
in the centre by	3
the situation of the	3
in which the shells	3
of species of terebratula	3
the curve of the	3
a bivalve shell are	3
and part of the	3
angular sinus in the	3
anterior termination of the	3
is generally of a	3
and the outer lip	3
the passage of the	3
included in this family	3
enumerated in explanation of	3
author of histoire naturelle	3
part of the foot	3
of which are figured	3
a fold on the	3
a term used to	3
with one or two	3
the centre by a	3
histoire naturelle des mollusques	3
of species of the	3
family may be thus	3
and also in the	3
it is the same	3
inner edge of the	3
near the margin of	3
the family of nayades	3
on account of a	3
in the soft parts	3
known from all other	3
are to be obtained	3
and one or two	3
genus described by de	3
belongs to this family	3
of the shell and	3
to be found on	3
at l s d	3
which they are applied	3
in order to distinguish	3
as soon as the	3
cardinal teeth in one	3
which the ligament is	3
species are mostly tropical	3
the last whorl covers	3
skin of the whale	3
is one which is	3
a term used by	3
without a regular spire	3
is known by the	3
equal to the aperture	3
the hinge of one	3
in general form and	3
as well as a	3
are composed of two	3
the genera included in	3
in relation to the	3
to the order conchifera	3
outer surface of the	3
is formed by the	3
in the flat valve	3
an operculum consisting of	3
order of paracephalophora hermaphrodita	3
from which it is	3
the third section of	3
of species of belemnites	3
takes its name from	3
by some authors to	3
to which they belong	3
terminating in a long	3
is common in the	3
outer lip with a	3
being larger than the	3
anterior and posterior extremities	3
common name for shells	3
the inner lip of	3
septa perforated by a	3
to which it belongs	3
supposed to be the	3
genus of marine shells	3
margins of the valves	3
in the tertiary strata	3
genus of minute land	3
the alphabetical part of	3
by an operculum of	3
in the characters of	3
columella contiguous to the	3
the posterior extremity of	3
as more or less	3
shells for the cabinet	3
order of the second	3
rounded at the extremities	3
from which the genus	3
not touch each other	3
given to shells of	3
in the ventral margin	3
have the outer lip	3
palleal impression sinuated posteriorly	3
some of which are	3
to of the conchological	3
but differs in having	3
posterior fold in the	3
of a number of	3
by the letter a	3
a point at the	3
divided into the orders	3
from the cardinal teeth	3
may be described as	3
genus composed of several	3
by the side of	3
which are attached to	3
as the whole shell	3
part of this genus	3
the spire of an	3
and some of the	3
some of them are	3
distinguished from those of	3
direction in which the	3
a small quantity of	3
the common garden snail	3
inner lip very thick	3
when there is a	3
the plaits on the	3
on the posterior side	3
a very large size	3
the edge of a	3
through the centre of	3
were it not for	3
into two equal parts	3
is the last genus	3
genus belonging to the	3
it is then described	3
pit in the centre	3
outer edge of the	3
some of the smaller	3
the present state of	3
of the two genera	3
include those species of	3
containing the microscopic genera	3
a generic name under	3
the few fossil species	3
under the command of	3
they consist of a	3
the generic characters are	3
it not for the	3
serve as an example	3
are described as irregular	3
of minute land shells	3
joined to each other	3
two valves of a	3
placed side by side	3
area in one valve	3
body of the parent	3
described as more or	3
of the genus belemnites	3
are of the same	3
is a british species	3
partly answers to the	3
they are then said	3
the external surface of	3
as in the cut	3
shell is composed of	3
has been separated on	3
will be indicated by	3
which may be known	3
the conchological illustrations by	3
this is a very	3
will give you an	3
and then proceed to	3
suture of the whorls	3
sides of the aperture	3
with three diverging cardinal	3
separating this genus from	3
which are attached by	3
univalve shell is said	3
with a pair of	3
been separated under the	3
from those of the	3
in the direction of	3
are represented in the	3
a deep red colour	3
and low water mark	3
a tooth on the	3
it belongs to the	3
de blainville in a	3
plants on which they	3
figured in the plates	3
of the animal and	3
in others they are	3
a genus described by	3
more or less oval	3
applied by some authors	3
and you will find	3
in a very short	3
and are remarkable for	3
the inner edge of	3
and separated from the	3
upwards of exquisitely coloured	3
is represented in the	3
the outer edge of	3
margin of the outer	3
shore line to fathoms	3
the mode of attachment	3
the forms of the	3
is known only in	3
on the coast of	3
may be had separately	3
are found in all	3
a notch in the	3
the two valves of	3
the hinge of arca	3
from which they differ	3
recent species are not	3
the species hitherto known	3
interior of the shell	3
and west indies and	3
in the opposite direction	3
placed near the centre	3
having the form of	3
name for shells of	3
by ribs radiating from	3
of symmetrical conical univalves	3
from the figures of	3
the fifth family of	3
in this family may	3
of the order pulmobranchiata	3
termination of the columella	3
confounding it with any	3
of the most important	3
with a short spire	3
on the posterior part	3
sir william jackson hooker	3
passage of the byssus	3
the shells for the	3
genera included in this	3
been found in the	3
of the successive layers	3
the umbones of a	3
term is applied by	3
its union with the	3
derives its name from	3
by the point of	3
to the ventral margin	3
found on our own	3
for a genus of	3
upon each other in	3
the command of captain	3
a bivalve is said	3
order of the first	3
in the course of	3
is a native of	3
from the appearance of	3
same may be said	3
the principal difference between	3
muscular impression of the	3
belonging to this order	3
in the manner of	3
generic name under which	3
much sought after by	3
ligamentary pit in the	3
of the most elegant	3
name given to shells	3
the floor of the	3
illustrated index of british	3
is remarkable for its	3
notch at the base	3
at the end of	3
name of the place	3
it is brought from	3
class of the sub	2
the remains of the	2
are described as of	2
that has ever appeared	2
teeth and bones of	2
part of the surface	2
of species of achatina	2
with a horny epidermis	2
shell may be known	2
if the fossils are	2
distinguished from any other	2
the imaginary axis of	2
composed of such species	2
a term applied by	2
have been separated by	2
of varices skirting the	2
living in holes in	2
in the time of	2
hinge with a small	2
truncated at the apex	2
family partly answers to	2
there are in many	2
are found buried in	2
dorsal margin of some	2
the order trachelipoda is	2
in which they were	2
are said to occur	2
other by means of	2
of small teeth on	2
corroded at the umbones	2
surface of some shells	2
they differ from the	2
the surface of one	2
ending in a straight	2
when a line drawn	2
a part of it	2
name given by de	2
front part of the	2
to a particular spot	2
consist of a pair	2
found in the genus	2
there is a notch	2
fixed to other bodies	2
will then correspond with	2
ciliated branchia which protrude	2
while in others it	2
application of this term	2
of the shell which	2
it is covered with	2
the attached valve is	2
curved towards the anterior	2
of india and china	2
in structure they are	2
in their natural state	2
for the sake of	2
the first division of	2
belonging more properly to	2
as seen in the	2
the pretty little shells	2
the shortness of the	2
to the stems of	2
which in some instances	2
the species are numerous	2
a sufficient reason for	2
we lose sight of	2
species are determined by	2
means of a hinge	2
of the plants in	2
attached by the surface	2
attachment of the mantle	2
with a fissure near	2
under one generic name	2
the surfaces of shells	2
covered by the last	2
a large and beautiful	2
which have an internal	2
be confounded with the	2
of which are of	2
lip spread over part	2
be done is to	2
between the inner and	2
cup and saucer limpets	2
perfectly formed before they	2
north and south america	2
and several other species	2
more properly placed in	2
with a spiral groove	2
centre by a triangular	2
no folds on the	2
the hinge of placuna	2
those which precede it	2
the baculite limestone in	2
from the apex or	2
described as being nearly	2
dorsal edge of the	2
by some naturalists to	2
of a single cell	2
to the axis of	2
in the upper beds	2
how to prepare the	2
the next time they	2
to signify that the	2
which is destitute of	2
this order are patelliform	2
is supposed to have	2
of this is to	2
the valley of the	2
and in some instances	2
in a state of	2
nearest to the apex	2
without regard to the	2
is then to be	2
the minuteness of the	2
formed for its reception	2
to one end of	2
to be seen at	2
tube of the animal	2
in the county of	2
genus composed of amphidesma	2
to which are described	2
other in such a	2
of the genus triton	2
and pointed at the	2
rounded like a teat	2
the shell is univalve	2
distance from each other	2
genus composed of ovulum	2
and in the mediterranean	2
a light brown epidermis	2
an indication of the	2
approach to this genus	2
are all pearly within	2
two similar teeth in	2
close to the umbones	2
and terminates in a	2
these are of three	2
the lobes of the	2
are united in the	2
attached by means of	2
are very common in	2
is a genus from	2
species with hidden spires	2
form a sort of	2
used in this sense	2
and beauty of the	2
is found fossil in	2
of the former is	2
in having but one	2
enclose the aperture of	2
tooth and a slight	2
with the named specimens	2
the ligament is exterior	2
process in the hinge	2
of the birds of	2
a shell is composed	2
we must pay particular	2
sinus in the impression	2
that part which is	2
also found in the	2
have been lately brought	2
gaping at the extremities	2
that some of the	2
the shape of a	2
its name is derived	2
one side to the	2
place where the head	2
the outer lip more	2
occupying the greater part	2
fissure in the lower	2
an instance of this	2
surface of a spiral	2
they are no longer	2
placed in a groove	2
the species are found	2
of this little work	2
are of two kinds	2
and the lines of	2
in the same manner	2
said to be bi	2
the valves of the	2
sinus in the lower	2
those which are found	2
attended by a crab	2
no genera of shells	2
to the surface to	2
of them in this	2
like shells of the	2
it is placed by	2
species from the indian	2
the animals which produce	2
of a pair of	2
forming a short canal	2
is brought from the	2
as shewn in cut	2
belemnites were formerly known	2
trays may be arranged	2
the common garden slug	2
in the british seas	2
a certain amount of	2
a regular series of	2
consists of four valves	2
placed upon the back	2
since the publication of	2
but differs in the	2
given by de blainville	2
the right side of	2
many of them are	2
may be distinguished by	2
terminating in a thick	2
sinus in the outer	2
will depend upon the	2
number corresponding to one	2
prominent tooth near the	2
a pretty genus of	2
to the imaginary axis	2
three feet in length	2
of the lip is	2
whorls are described as	2
passing through an opening	2
aperture of an univalve	2
of fossil organic remains	2
from one side to	2
to the edge of	2
in shallow water on	2
surround the body of	2
and tapering at the	2
should be added to	2
folds on the inner	2
is sometimes used as	2
and pressed and dried	2
ligament contained in a	2
sheets of drying paper	2
of the animal is	2
the shell of this	2
shells differ from the	2
supported upon a prominent	2
in the rivers and	2
plaits on the pillar	2
and a half long	2
of lime in it	2
of each of these	2
the plants collected by	2
numerous slowly increasing whorls	2
are attached to sub	2
belonging to the genera	2
account of a difference	2
weeds in all climates	2
shaped process in the	2
recent species are known	2
also used as a	2
form and structure of	2
of the columella is	2
is a handsome species	2
is known in the	2
umbo of the lower	2
the shores of kent	2
two in the other	2
advancing from beneath the	2
commonly called the paper	2
consists of numerous whorls	2
species of this singular	2
this family partly answers	2
seen when the valves	2
many species of venus	2
the top and bottom	2
to know where to	2
the name of this	2
not agree with the	2
shape according to the	2
are known by having	2
in the last named	2
that which is nearest	2
and the ventral margins	2
are very pretty shells	2
characters of the animal	2
with a tooth on	2
properly to the genus	2
in a soft state	2
they are separated into	2
the singularity of the	2
of which are either	2
all the shells are	2
are distinguished by having	2
angles to the handle	2
themselves by means of	2
gaping at both ends	2
to the propriety of	2
covered by an enamel	2
from the baculite limestone	2
on the posterior extremity	2
and an external ligament	2
close to each other	2
which have no shells	2
that it is not	2
danger of confounding it	2
the surface is rough	2
in all of them	2
last of which belongs	2
removed from each other	2
of which this genus	2
all the species are	2
floating in the sea	2
the animal to be	2
in a kind of	2
produced into an elongated	2
not the case with	2
so as to be	2
are attached to stems	2
little shells of this	2
the place of the	2
histoire naturelle des animaux	2
they are attached to	2
under side of the	2
this genus derives its	2
are also to be	2
a posterior fold in	2
of one valve with	2
are to be seen	2
of one or several	2
the geology of sussex	2
with alphabetical and systematic	2
by means of the	2
low down as the	2
those who have not	2
a genus from the	2
is on the opposite	2
would divide the shell	2
be added to the	2
to some of the	2
shell composed of two	2
the way in which	2
end of the shell	2
is best seen in	2
those which are attached	2
formed before they leave	2
when the edge of	2
and structure of the	2
closely resemble our own	2
animals enclose the aperture	2
one lateral tooth in	2
roots of the grass	2
figured in parts to	2
from the inner surface	2
the genus has been	2
from the shore line	2
folded over the margins	2
distinguishing them from the	2
correspond with his right	2
up to the present	2
which may be thus	2
of those which are	2
be seen at the	2
explain the general principles	2
partly hidden by the	2
central and southern europe	2
which a few fossil	2
upwards of six hundred	2
to begin with the	2
are furnished with a	2
rarest and most beautiful	2
of the limpet tribe	2
the lower part is	2
on rocks and sea	2
sufficient reason for separating	2
in sand and mud	2
in an oblique direction	2
generic name proposed for	2
beaked or angulated posteriorly	2
the last of the	2
consisting of depressed species	2
it is nearly allied	2
family answers to the	2
is farthest from the	2
been formed for the	2
have two adductor muscles	2
which the valves are	2
shell is described as	2
a place in the	2
are principally from the	2
at l s in	2
as the outer lip	2
is swelled into a	2
north as the mediterranean	2
been placed among the	2
present advanced state of	2
being confounded with any	2
from those of all	2
which are of two	2
contracted in the centre	2
in which respect it	2
the two or three	2
a small group of	2
by the flat area	2
against each other conically	2
of the species of	2
with the interior of	2
inner lip not thickened	2
in the river below	2
second order of paracephalophora	2
above description is framed	2
of a bright amber	2
generic division of the	2
to the aperture of	2
differs in the number	2
beautiful genus of shells	2
disc in the lower	2
a bony substance passing	2
a rare and curious	2
the outer part of	2
which fossils of the	2
fossil species are numerous	2
marked with the letter	2
separated from the cartilage	2
one remote lateral tooth	2
the other genera are	2
of the shell will	2
are described as more	2
it has the power	2
is the largest of	2
from the asiatic seas	2
answers to the genus	2
is of a deep	2
the keel of a	2
having the inner lip	2
the specimens for the	2
a genus of lepidopterous	2
advanced state of the	2
it is one of	2
it among his rudistes	2
side of the axis	2
with several oblique folds	2
remainder of the shell	2
which is represented in	2
cannot be separated without	2
shallow water to fathoms	2
before they leave the	2
will be seen to	2
shells which are attached	2
near the base of	2
may be as well	2
of the following genera	2
which are not so	2
spire is described as	2
animal is attached to	2
so called on account	2
they are composed of	2
which they are arranged	2
geographical or geological distribution	2
is always near the	2
more or less inequilateral	2
empty shells are to	2
catalogue of all the	2
accessary valves of a	2
the next thing is	2
is the case in	2
applied to a shell	2
such a manner as	2
mouth of the shell	2
to form a flattened	2
from the latter in	2
this family includes the	2
of which a few	2
in the mode of	2
of the red sea	2
of the nature of	2
in the southern ocean	2
on the outside by	2
are placed in the	2
genera are included in	2
are found both in	2
the difference between this	2
produced into a triangular	2
l s this is	2
tooth on each side	2
which in mytilus is	2
shells of this section	2
the most remarkable of	2
spread over the surface	2
exception of the genus	2
belongs to the genus	2
naturelle des animaux sans	2
species found in great	2
are provided with opercula	2
to be beyond the	2
in the latter is	2
this genus of pretty	2
genera enumerated in this	2
valve on each side	2
de malacologie et de	2
genus of fossil shells	2
with or without a	2
a familiar introduction to	2
either internal or external	2
on the dorsetshire coast	2
which differ from the	2
of the shell being	2
entirely composed of the	2
in the hinge for	2
apex or nucleus of	2
the order conchifera monomyaria	2
the surface to breathe	2
the species belong to	2
difference between this genus	2
to those species which	2
in the inner surface	2
the author in the	2
on which they rest	2
one hundred and seventy	2
that nearest to the	2
then to be placed	2
bony appendage on the	2
them out of the	2
these shells differ from	2
distinguished by the muscular	2
one impression in each	2
whorls overwrap each other	2
said to be of	2
that they cannot be	2
the genera aplysia and	2
a series of transverse	2
a small triangular disc	2
greater part of them	2
covered with a light	2
extremity of the columella	2
locomotion consist of a	2
siphonal tube of the	2
with a view to	2
malacologie et de conchyliologie	2
in not having a	2
from the umbones to	2
are represented in parts	2
called from the resemblance	2
on the under side	2
at the point of	2
being fixed on the	2
in the place where	2
when the valves of	2
conclusions as to the	2
of the order cervicobranchiata	2
absence of the notch	2
the stems of gorgonia	2
is given to such	2
is that part which	2
entirely covered by the	2
is divided into three	2
fossils composing this genus	2
in one or two	2
of species of mactra	2
aperture or opening of	2
groove near the suture	2
be considered as the	2
a genus of land	2
from which its name	2
hipponyx has only two	2
of the pillar with	2
to which are added	2
greater or less extent	2
by some conchological writers	2
the last whorl is	2
are not of any	2
the east indies and	2
by the substance of	2
of one or more	2
the case of spirula	2
placed at the head	2
one fold on the	2
the short anterior side	2
or lines of growth	2
largest of the british	2
included in the family	2
the fourth order of	2
with depressed spires and	2
consisting of those which	2
and other species having	2
three diverging cardinal teeth	2
insects of india and	2
been divided into the	2
indicate the position of	2
by him in the	2
largely quarried in the	2
species of venus auct	2
of the sea by	2
is some difficulty in	2
pointed at the posterior	2
on one side only	2
and divided into the	2
regular in their form	2
was afterwards abandoned by	2
and ciliated branchia which	2
the animal must be	2
for they are not	2
for a short time	2
with several other species	2
with the nucleus lateral	2
little that can be	2
called the paper sailor	2
the first containing the	2
remarkable for the irregularity	2
manner in which it	2
which will be found	2
canal turned suddenly over	2
divided the genus helix	2
family includes the genera	2
from the last whorl	2
is rounded like a	2
a drop of acid	2
shells very variable in	2
it is also applied	2
belonging to the brachiopoda	2
the cartilage placed in	2
separates the volutions of	2
point of union with	2
appears to be accidental	2
each other side by	2
there is some difficulty	2
a short canal at	2
catalogue published by the	2
under part of the	2
into a new genus	2
history of the insects	2
the distinctions upon which	2
you will find the	2
and on the other	2
consisting of numerous valves	2
an opening in the	2
gaping at the sides	2
which they are distinguished	2
found principally in the	2
shells are brought from	2
a large number of	2
there are two british	2
edge of the muscular	2
less rapidly enlarged than	2
but what a number	2
put away in the	2
the umbones to the	2
a manner as to	2
of paper and placed	2
will be given in	2
the under side of	2
no teeth in aperture	2
the ventral margins of	2
under the influence of	2
make yourselves familiar with	2
some of the more	2
genera may be distinguished	2
spire and aperture of	2
and the want of	2
the general appearance of	2
of this marine genus	2
they are all marine	2
first division of the	2
in the bag or	2
of the animal itself	2
belonging to which are	2
elementary acquaintance with the	2
teeth or raised points	2
and his cancer friend	2
of the endochrome of	2
may be arranged in	2
species of which are	2
the internal surface of	2
one or two smaller	2
spread over the front	2
form the family of	2
rocks at low water	2
on the surfaces of	2
in the opposite case	2
with a very large	2
inner lip reflected over	2
to the spire of	2
these it will be	2
they are capable of	2
is of opinion that	2
in the thinness of	2
a large species of	2
that the animal has	2
covered with a polished	2
are all more or	2
so that they may	2
and covered by a	2
three or four species	2
of this genus has	2
term applied by some	2
is that nearest to	2
the mantle not sinuated	2
fossils of the south	2
of the valves of	2
when the apex of	2
surface of one valve	2
anteriorly in a very	2
and the greater part	2
are found in rivers	2
situation of the siphon	2
of a shell when	2
first order of paracephalophora	2
the soft parts are	2
which have the internal	2
the outline of the	2
prominent folds on the	2
passing through a fissure	2
that part of a	2
tabular view of geological	2
consisting of few rapidly	2
the valves are equal	2
the order annelides sedentaria	2
distinguished by the plaits	2
bands of colour in	2
from the shores of	2
part of these are	2
rare and curious shell	2
a triangular area in	2
a perforation in the	2
to form part of	2
the main mass of	2
neither of these are	2
in some species the	2
at the sides it	2
this term can only	2
the texture of the	2
aperture of their shells	2
this description includes the	2
get them out of	2
the lower end of	2
those which are placed	2
to be obtained by	2
confluent with the outer	2
by the plaits on	2
portion of their own	2
is very variable in	2
and the last being	2
with the last whorl	2
the muscular impressions are	2
the most prominent part	2
small portion of the	2
which is characterized as	2
of three or four	2
of them are very	2
is in some species	2
on the left side	2
part which is farthest	2
posterior elevation in the	2
resembling isocardia in form	2
framed so as to	2
perforated by a siphon	2
attached to each other	2
attached by a small	2
on the posterior dorsal	2
of the shell on	2
produced into a point	2
also in the fact	2
joined together side by	2
in a long straight	2
in a perpendicular position	2
is found near the	2
produced for the occasion	2
called the parietal valves	2
divided into the sub	2
the explanation of figures	2
the spire nearly hidden	2
to be mistaken for	2
next thing to be	2
at the upper part	2
this order contains the	2
the fin of a	2
to point out the	2
top of the shell	2
the same as the	2
des mollusques terrestres et	2
passing through a sinus	2
and forming a short	2
of some univalve shells	2
to one of the	2
as low down as	2
pedunculated cirripedes of lamarck	2
side of the hinge	2
to have been placed	2
shells belonging to which	2
its name from a	2
to the present advanced	2
of shells in the	2
to the arrangement of	2
pairs against each other	2
part of the lower	2
aperture turned up towards	2
of the pacific ocean	2
europe and north america	2
the shells are usually	2
of the entomological society	2
great majority of instances	2
upper edge of the	2
right side of the	2
genus of small land	2
one on the outer	2
of the mantle not	2
top of the aperture	2
in mytilus is terminal	2
has a tooth on	2
the name is derived	2
acquire an elementary acquaintance	2
be beyond the reach	2
not only in general	2
are always more or	2
siphon close to the	2
probably belong to the	2
captain sir john franklin	2
or coat of mail	2
containing no testaceous mollusca	2
of the class paracephalophora	2
to include species of	2
supported on the edge	2
in this family is	2
outer part of the	2
its place in the	2
tooth on the outer	2
the teeth and bones	2
palleal impressions with a	2
action of opening and	2
bony substance passing through	2
those in which the	2
pinna and his cancer	2
is a very excellent	2
radiating from the centre	2
fossil species of this	2
is the name given	2
last whorl covers the	2
term can only be	2
so called from the	2
called on account of	2
specimens for the cabinet	2
sutures of the spire	2
the influence of the	2
one muscular impression in	2
as resembling a nautilus	2
of captain sir john	2
sinus near the anterior	2
a pit in the	2
of the shell to	2
shells should be placed	2
belong to the class	2
found in the newest	2
covered with a velvety	2
impression having a slight	2
the two latter of	2
with a light brown	2
are three british species	2
which ought to have	2
always more or less	2
that in the latter	2
to include the genera	2
formerly included in the	2
in the genus eulima	2
run by imperceptible gradations	2
hinge of the larger	2
one extremity of the	2
genera into which de	2
muscular impression in each	2
separated from the body	2
of the genus solen	2
cavity is divided into	2
extremities of the shell	2
is not easy to	2
the next thing to	2
separated by a small	2
of a former world	2
enough to receive the	2
as to include all	2
of or divided into	2
which have two adductor	2
that has yet appeared	2
to form a distinct	2
so far into their	2
means of a bony	2
in which it lies	2
the following genera are	2
canal at both extremities	2
forming the base of	2
are largely quarried in	2
to be confounded with	2
the animal is said	2
last being larger than	2
said to have an	2
the genera of which	2
to the action of	2
each other in such	2
when they do not	2
is contained in the	2
the base by a	2
when the edges of	2
a small external ligament	2
to the surface of	2
this genus from others	2
far the greater number	2
in the inner lip	2
the shell is then	2
and terminating in a	2
of which ought to	2
be reduced to half	2
they do not touch	2
other genera of land	2
the division of the	2
a minute fossil resembling	2
towards the anterior margin	2
contained in the family	2
in reference to the	2
continuing in a straight	2
genus on account of	2
contains some of the	2
several fossil species are	2
in other respects resembling	2
very few species are	2
divide the shell into	2
of exquisitely coloured figures	2
aperture terminating in a	2
described as intermediate between	2
hinge with a thick	2
seventh family of the	2
with a deep slit	2
of binding the two	2
those shells which are	2
of this proposed genus	2
which they come in	2
in the zoological proceedings	2
the shell from the	2
the aperture in length	2
de blainville remarks that	2
others it is decumbent	2
more or less completely	2
is found in some	2
consisting of the following	2
by a central siphon	2
centre of the disk	2
strong folds on the	2
the fronds of which	2
placed at the sides	2
layers of which a	2
covers those which precede	2
to animals of this	2
third family of polythalamous	2
is described as having	2
from the rest of	2
and not at all	2
a hole in one	2
fragment of a filament	2
in the muscular impression	2
contains only a few	2
of union with the	2
a genus proposed by	2
element in which they	2
operculum is described as	2
this family answers to	2
receives its name from	2
teeth or folds on	2
various localities and depths	2
mollusques terrestres et fluviatiles	2
account of the little	2
those in which they	2
corresponding with the family	2
derived its name from	2
separated by a deep	2
impression of a bivalve	2
composed of the genus	2
inside of both valves	2
coronular by de blainville	2
produced into an acute	2
present state of the	2
hinge with a triangular	2
well known to all	2
distinguished from other genera	2
any shell or part	2
the fact of the	2
from the umbones and	2
if both these genera	2
which are placed at	2
which may be considered	2
genus of shells is	2
the length of the	2
at the anterior termination	2
may be observed that	2
said to have been	2
structure of the valves	2
is framed so as	2
is composed of some	2
across the cavity of	2
is distinguished from venus	2
in which to carry	2
it is very variable	2
a varix at the	2
foot and a half	2
slightly beaked or angulated	2
of one or two	2
distance from the umbones	2
but one recent species	2
a series of limestone	2
with two cardinal and	2
series of teeth placed	2
ligament supported upon a	2
some parts of africa	2
attached to the hinge	2
belong to the brachiopoda	2
by which the two	2
a native of our	2
the columella has a	2
spiral near the apex	2
an undulation in the	2
the umbo in one	2
is near the centre	2
the aperture of an	2
they take their name	2
and descriptions of new	2
side to the other	2
close the aperture of	2
a generic division of	2
are next in order	2
said to be dorsal	2
attached to the rocks	2
found in fresh water	2
is a row of	2
of small land shells	2
termed the under valve	2
by a portion of	2
and the umbilicus filled	2
the interruption of the	2
the former is the	2
and the animal is	2
distinguished from this genus	2
are considered by swainson	2
are all of the	2
the rock pools and	2
separated into the following	2
is difficult to know	2
is wholly a fossil	2
the name given by	2
at the foot of	2
out so as to	2
when there is one	2
both these genera were	2
of skye and mull	2
recent species are mostly	2
perforated by a central	2
at once distinguished by	2
conchacea are those which	2
in the islands of	2
on the upper surface	2
by the shortness of	2
species run by imperceptible	2
by lamarck and other	2