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Canada

Btpurtmtttt 0i Mint0

Hon. LOUIS CODERRE, Minister:
R. G. McCONNELL, Deputy Minister.

<8r0Uigiral 1^urt^t^

Museum Bulletin No. 20

GEOLOGICAL SERIES, No. 29

OCTOBER 8, 1915

AN EURYPTERID HORIZON IN THE NIAGARA
FORMATION OF ONTARIO

M. Y. Williams

OTTAWA

Government Printing Bureau

1915

No. 1>74

October 8, 1915.

Canada

Geological Survey

Museum Bulletin No. 20

GEOLOGICAL SERIES, No. 29.

An Eurypterid Horizon in the Niagara Formation of Ontario.

By M. Y. Williams.

GENERAL STRATIGRAPHY.

The top of the Lockport member of the Niagara formation
of Ontario consists of thin-bedded dark grey or chocolate brown
bituminous dolomites which at some localities include bituminous
shales. In some districts the cleavage along bedding planes
is exceedingly even and slabs may be obtained that suggest
roofing slates. Flagstones are quarried from such beds near
Wiarton. At other localities the bedding is uneven, though
thin. These characteristic beds are well exposed along the
banks of the Eramosa river between Rockwood and Guelph,
and for them the name "Eramosa beds" is proposed. Sir
William Logan^ described the Guelph dolomites in the vicinity
of Guelph as resting "upon dark coloured bituminous strata"
*i 1 ' . nlaced in the Niagara formation. His reference was
I. ! . under discussion.

' ' 7.ramosa beds are very uniform in their general char-
^\t the north end of the Bruce peninsula they are 30
feet iiiick; at Wiarton, they measure over 40 feet; at Guelph,
30 feet or more; and at Spencer creek, 7 miles west of Hamilton,
more than 35 feet. South of Hamilton, the highest of the
dark slaty beds, known locally as the "Barton beds," are
probably the equivalent of the Eramosa. The Barton beds

■ Gcol. Surv. of Can., Report of Piosms, from ita commencement to 1863. p. 337.

3 MUSBVII BULLETIN NO. 10.

are about 70 feet thick, consist of thin to thick-bedded dolomite
with interbedded shale, and contain numerous Niagara fossils.
Except in the vicinity of Hamilton and Guelph, the Eramosa
beds appear to be unfossiUfcrous.

The Guelph formation rests conformably upon the Eramosa
dolomites, the contact being transitional and the lower Guelph
beds being quite bituminous at many of the southern localities.
The Guelph beds are, however, usually 1 to 2 feet thick.

Where well exposed, the Eramosa beds exhibit beautifully
symmetrical domes 100 to 200 feet across with centres rising
i5 to 20 feet above the rim. Along the north shore of the Bruce
peninsula such domes are common. In the eastern part of the
city of Guelph, a well developed dome has been left in the floor
of a quarry. This is at the top of the Eramosa beds. South
of the prison farm near the Eramosa river, a coral reef rises
through Eramosa beds which have been eroded from its top
but still flank its sides. The reef is 35 yards wide by 85 yards
long and rise?, about 20 feet at the centre. Some irregular
bedding shows at one end. The following fossils were found in
the reef material: Slromatoporoids, Omphyma stockesi Edwards
and Haime, Pycnoslylus guelphensis Whiteaves, P. elegans
Whiteaves, Favosites k''singeri Edwards and Haime, Cladopora
sp., Heliolites s^nopora Hall ? Bryozoa, Rhynchotreta cuntata
americana Hall ?, Camarotoechia neglecta (Hall), and a trilobite
pygidium.

This fauna is in the main typically Lockport, but the pres-
ence of the two species of Pycnostylus, which are among the most
typical of Guelph species, indicates that in this old reef tran-
sitional conditions existed. The reef explains the origin of one
mound which formerly existed in the Eramosa beds.

LOCATION AND OCCURRENCE OF THE EURYPTERID

FAUNA.

East of Guelph at the crossing of the Canadian Pacific
and Canadian Northern tracks and not far south of the Eramosa
river, the Canadian Northern road bed has been constructed
of chocolate brown, bituminous shales excavated from the right
of way. It is these shales that furnished the fauna here described.

000365:Kj

AN lURVrTBUD HOtUON IN TBB NIAGARA. 3

The depth of excavation was 3 to 4 feet, the fauna being entirely
confined to this horizon. Fragmentary fossils were also found
in place and it appeared that most of the remains were contained
in about 6 inches of strau. The horizon is about 25 feet below
the base of the Guelph formation.

TH i^AUNA.

The following species were found at the above described
locality. Lichenalia concentrica Hall, Monomorella cf . orbicularit
Billings, OrbicuUndea subplana (Hall), Orthis? near tmuidens
Hall, Camarotoechia wkitei (Hall) ?, Spirifer radiatus Sowerby ?,
Whitfieldella nitida Hall?, Anoplotheca? sp., Meristina? sp.,
Conularia niagarensis Hall ?, Conularia sp., Eusarcus logani sp.
nov. Someother poorly preserved fossil material was found, which
has not been identified. Some fragments appear to be crinoid
columns.

Not only are the fossils all from the same horizon, but
numerous OrbicuUndea occur on the same slabs with Eusarcvs
fragments and also resting upon Eusarcus telsons.

FAUNAL AFFINITIES.

From the occurrence of the genus Eusarcus in the fauna
of the Eramosa bec^s we are led to compare this fauna with others
also including Eusarcus. Three Silurian horizons have furnished
this genus, viz., the Bertie' waterlime of New York and Ontario,
the Kokomo* waterlime of Indiana, and the shale beds of the
Shawangunk* grit of eastern New York. The Bertie waterlime
and Shawangunk grit possess only crustacean faunas, and as
Eusarcus logani v - Mite unlike species found in them ii is conse-
quently difficult lake comparisons. In the case of the Ko-
komo* waterlime -• Indiarxa, it is different. Eusarcus newlini
of that horizon is perhaps more closely related to E. logani

■ Pohlman, Juliui, Buffalo Soc. Nat. Sd., Bull. 5, 23, 1886.

■CUypole. E. W., Am. Geol.. Vol. VI, pp. 258-260, 1890.

* Clarke, J. M., and Ruedemann. Rudolf, N.V. State Mui. Bull. 107, p. 295.

< The Age of the Kokomo accnrdiog to Clarke and Ruedemacn it Lockport: N.V, State
Muieun Memoir 14, 1912, Vol. I, p. 87. Kindle, however, concludes that It i« "either a Salioa
or Cobleakia borlson." Am. Juur. Scieoce, Vol. XXXVI, Sept., 1913, p. 288.

* MUaBUU BVLLBnN NO. 20.

than any of the other species and the fauna in the limestone
immediately above the eurypterid beds contains a iiumber of
brachiopods of which two genera are in common with the fauna
of the Eramosa beds. The Kokomo contains WhUfiekUlla erecta
Foerste and Anoplotkeca congregata Kindle; the Eramosa, W.
nitida Hall, and Anophtkeca? sp.

Leaving out of account the eurypterids, the Eramosa
fauna is related as follows: Orthis near tenuidens suggests
Clinton affinities; WkUfieldella nitida and Conularia niagarensis
are Rochester species; Lichenalia concentrica and Spirifer
radiatus are characteristic of the Rochester and lower Lockport;
and Camarotoechia whitei is a true Lockport species: Monomorella
orbicularis, with which I have compared the Eramosa species, is
typically Guc'oh.

Summing up, in the Eramosa shale beds at the top of the
Lockport, there is a recurrence of a part of the fauna character-
istic of the Rochester shale, with even a suggestion of a CUmon
type, these hold-overs being mingled with more typical Lockport
species and one forerunner of the characteristic Guelph f'.r..ia.
Thus, we have very good palaeontological evidence of ti.e con-
formable relations of the Niagara and Guelph formations. The
coral reef, occurring in the Eramosa beds, as already described
above, contains additional evidence in its mingled Lockport
and Guelph species that the eurypterid fauna lived at a period
of transition between Lockport and Guelph time. The pre-
ponderance of the eariier elements, however, maks it seem
advisable to class the Eran^osa beds, as has formerly been done,
with the Lockport rather than the Guelph.

Discussion has formerly arisen as to the habitat of the
eurypterids and examples are rare where eurypterids and
well established marine species occur in the same beds. That
in this case the eurypterids lived in an entirely marine
habitat is show, by the associated fauna.

An BUITrTMID HoaitON IN TBB NIAGAIA. S

DESCRIPTION OF SPECIES.
LiektnaUa concentrico Hall.
I !ate I. flgure 1.

Specimens fragmentary; surface generally undulatory;
radial and concentric stria about 0-5 mm. apart. In both seU of
striae there is a tendency for some of the furrow to be much
stronger than others.

From the above described characters, there appears to be
little doubt that this is L. coneentrica, described by Hall from
the Rochester shale and lower Lockport limestone at Rochester
and Lockport, New York.

MoHomoreUc cf. orbicularis Billings.

Piatt I, figure 2.

One specimen, which I have compared with the above species,
occurs in the collection. It is 26 mm. wide and 27 mm. lor j,
the shape being suborbicular with the greatest width forward
of the centre of the shell. The specimen is an exfoliated pedicle
valve. The growth lines are well preserved, but the interior
structure is not visible except at the beak, whei« wear has
exposed the median septum and the fillings of the ends of the
umbonal chambers. I have compared this specimen with Bill-
ings type (internal mould) of M. orbicularis and find murh
similarity. However, the preservation of the two specimf. s
is so entirely different that it is very difficult to be certain /
their identity. I have noted some differences in the proportioi^
of the umbonal cavities as represented in the ;wo <!p^imen8
and I have consequently compared the present spe-'Tien with
M. orbicularis instead of making a definift; a«.terminati<jn

Orbiculoidea subplam (Hall).

Plate I, figures 3, 4, 5.

This species, which is represented by many individuals,
is suborbicular with axes averaging about 5 and 8 mm. Valves

• MUSEUM BULLETIN NO. 20.

compressed; apex sub-central; pedicle groove narrow, extending
about one-half the distance or less from the apex to the margin
of the shell ; lamellae erect and numbering seventeen to twenty
in the average specimen.

These specimens are less than one-half the size of specimens
from Arisaig, N.S. The latter specimens are also much moi«
convex and tend to have a more elliptical outline and coarser lamel-
lae, the number of which are about the same as in the specimens
here described. The Arisaig specimens occur in limestone and
it is thought that the differences between them and the above
may be due to habitat, and in part to pressure.

Orthis? near tenuidens Hall.
Plate I, figure 6.

Small, averaging about 7 mm. wide and 4-S mm. long.
Hinge line straight, nearly as long as the width of the shell.
Brachial valve somewhat concave, with a slight median depres-
sion and probably a slight convexity near the beak. Plications
rounded; incurved from the cardinal angles; increasing by im-
plantation; number about 40. Pedicle valve convex. Char-
acters poorly preserved in material at hand.

This species appears to be very near if not identical with
Hall's 0. tenuidens from the Clinton of Oneida county, N.Y.

Camarotoechia whitei (Hall) ?

The presence of this species is based on one badly crushed
specimen. Its size, shape, and characters of plications all point
to this being the same as Hall's species from the Niagara of New
York.

Spirifer radiatus Sowerby ?

Plate H, figure 1.

The specimens referred to this species are casts of interiors
of pedicle valves and are small, the largest being less than 10 mm.
in length. The casts show clearly the impressions made by
the long dental plates.

AN BURYPTBUD HOUZON IK THB NIAGARA. 7

WkitfUldella nitida Hall ?
Plate II, figure 2, numerous small specimens.

Small whitfieldellas are very common in some layers of
rock; they are generally less than 5 mm. long, vary considerably
in proportion of length to width, and have sharp erect beaks.
In all characters excepting the erect beak, this little whitfieldella
appears to be clearly referable to the species nitida.

Meristina? sp.

Plate II, figure 2, single large specimen.

A single poorly preserved pedicle valve 12 mm. long by
9 mm. wide with a well-defined sinus from beak to front is doubt-
fully referred to this genus.

Anoplotheca ? sp.

Plate II, figure 3.

A single mould of what appears to be a pedicle valve of
a shell doubtfully referable to this genus, measures 14 mm. in
breadth and IS mm. in length. The convexity was never
great, and was probably most marked about the middle of the
shell. Crushing has reduced the convexity. The shape is nearly
circular, excepting for the beak which protrudes slightly. The
apical angle is about 115 degrees. The plications are straight,
subangular, and number eighteen. They increase towards the
margin by bifurcation.

Conularia niagarensis Hall ?

Plate II, figure 4.

One specimen appears to represent this species. It is
5 cm. long by 3 • 2 cm. wide, and tapers rather abruptly towards
the apical end. So far as they are preserved, the characters
of this specimen agree closely with the figures given by Hall
(Palaeontology of New York, Vol. II, PI. 65). The transverse

MUSBtm BtTLLBTIN NO. 20.

Striae, however, are grouped in bundles separated by deeper
furrows, thus giving the surface a decided rugose appearance.
The character of the surface integument cannot be determined,
owing to the poor state of preservation.

Conularia ? sp.

Plate II, figure S.

One specimen is doubtfully referred to this genus. From
the apex it broadens greatly, having a width of 4 cm. at a
length of 5 cm. along the mid-line. The sides approximate con-
verging arcs of eccentric circles. The concentric plates are a
little more than 1 mm. wide, overlap consecutively away from
the apex, are longitudinally striated, and appear to be crossed
by transverse striae. The general shape of the specimen and the
lack of reflex curve in the plications so characteristic of Conularia,
make it appear uncertain whether after all it belongs in this
genus.

Eusarcus logani^ sp. nov.

Plate III, figures 2-6; Plate IV, figures 1, 2; Plate V, figures 1-5-

The above species is described from the following fragments:
post-abdominal segments; telsons; spines from the ectognathites
or walking legs; manducatory edges of the gnathobases of the
swimming legs; and a metastoma.

The post-abdominal segments appear to be 5 in number
and measure together, in the best preserved specimen, 3 cm.
in length. At the attachment with the abdomen (the posterior
segment of which is slightly indicated) the width is l-S cm.
The terminal post-abdominal segment measures 1 • 1 cm. in width
and has two lateral, posteriorly directed processes between
which the telson was attached. The surface integument is
covered with fine pits.

The telsons are ensiform, straight, and from 5-5 to 8 cm.
long, with a proximal width of 8-11 mm. They are crushed

1 Named in honour of Sir Wm. Logwt who deicribed Uw bedi In which the fowUi were found.
Geol. Surv. of Canada, 1863, p. 337.

AN BntTmUD BOKBON IN THB NIAGASA. 9

and (probably from this cause) have two longitudinal grooves
dividing the area into three parts, the centre containingone-half and
the sides each one-quarter of the total area. The proximal ends of
some specimens are enlarged and rounded, indicating a well form-
ed joint with the distal, post-abdominal segment.

The spines from the ectognathites or walking legs measure
1 • 7 to 3 • 5 cm. in length, • 35 to • 5 cm. in width at mid-length,
and 0-4 to 0-6 cm. in width at the joint.

These spines are nearly straight, the thicker edge being
convex and projecting slightly beyond the thinner edge, which
is gently convex near the proximal end and resupinate near the
point. In one specimen the joint is considerably enlarged and
thickened. The spines, although crushed to some extent,
appear to have been very thin.

The manducatory edges of the gnathobases of the swimming
legs occur plentifully and in a fair state of preservation. The
rows of teeth measure nearly 1 cm. in length and are made up
of 5-6 conical cusps which vary from 2-5 mm. at one end of the
row to less than 1 mm. at the other end. Both the line through
the bases of the cusps and the line along their crests are concave.

The metastoma is represented by a fragmentary plate which,
however, shows the "broad and short, subtriangular" shape
characteristic of Eusarcus. At its widest part, it is 1-1 cm.
and at the narrowest part 0-8 cm. wide, the fragment being 0-8
cm. long.

Other plates occur which have not been identified with
certainty. Their surfaces are covered with fine pits.

I have referred this species to the genus Eusarcus on the
following evidence: the broad, short, subtriangular shape of
the metastoma; the number and large size of the spines of the
walking legs; and the indicated enlargement of the abdomen.

Logani differs from other species of Eusarcus in the pro-
portionately great size of the spines and telson. From E.
scorpionis this species differs also in having a straight ensiform
telson.

•'!'

Explanation of Plate I.

Figure 1. LichemiUacoHeentrica Hall. (Page S.)
-»'"»5"0'«tfo cf. orbUularis BilUngs.

1 ^nA A^a.^/"^^ P*l'y, *°^ iodide valve,
and 4. pr6tctifo«iea subiiana (Hall) ?

. ^f«*«:*e' valves. (Page .S.)
5. Or6(c«A>i<fea sub^ana (Hall) ?

(Page 5.)

On telaon of Eusarctu lotami.
OrlMt} Btar tenuiiUHS HaU.
Brachial valve. (Page 6.)

(Page 5.)

Illustrations natural

sue.

MtSElM BII.I.KTIN Ni. JO.

1.'
I'lUK I.

-i
1

9
3

! I

Explanation of Plate II.
Figure 1 . Spinier radiatus Sowerby ?

« Mould ot pcSicle valve. (Page 7.)

« ;■ £<^«f"'»a »n««ar«i«> Hall ? (Page 7.)
5. Contuanai sp.

Interior of shell. (Page 8.)

Illustrations natural siw.

' l^mT\

Mt'SKUM BlLLETIN No. 20

.. ,,-,^,.

Explanation ok Plate III.

Figure 1.
" 2.

Undeterminetl.

Metastoma of Eutarcus logani. (Page 9 )

'"" i«.aS/cr„r(P'air.>l '""''"•"'"' ■" ^*""™"« '^«^ °'

'T„ir.S"'''a>ay qV~'"'''"'^'~°' ectognathite of
Telson of Eusarcus logani. (Page S.)

Illustrations natural size.

Ml'ItKUM BULI.KTIN No. 2«.

axTt III.

k i

1 i

^^B

^^^

'S of

^mm

e of

i !

Explanation of IYate I\'.

Figure I. B.Ml^U.u.s, ,.Is.,n. an.l spine fr..,„ «„,g„a,hi,e of Eusarcus logani.
2. ''osl-iiRcldminal segnu-nis of £Hj.rc«j %«»,•. (Page X.)
Illustrations natural size.

AAS±±m

Mi'SBUH Bulletin Na 20.

Plate IV.

logani.

Figure I.

" 3.

« 4.

" 5.

Explanation of Platk V.

Manducatory edge of gnathobase
Restored Metastoma.
P^ "abdominal segment res ored.
Side view of a compressed telson.

Illustrations natural size.

MfSEUSi Bulletin No. 2t)

I'LATK V.

\ "h

LIST or MUSEUM BULLITINS.

^TThe Mu»Min BuUttiaa., publiibed by the Geola(ic«l Surrey, an num-
bmd cooMcutively and are given « lene* nHmber in addition, tlma: Geolosical
sS^ N* I'i'i'^' **"•'**** ^"^ '*'*• ''• 2. 3, etc.; AatiwDpola^

InUie <a« of BuUedaa 1 •«» 2, whidi contain artideaga vaiioui lubject*
•Mh article haa been aMgned a wparateieriet number. ~— """jw^

The fint BuIMm wu eatitM Victaria Memorial Mtumm BtJItHm-
mbaequent laauca have beea called ilutemm Pirffirfni

Mos. Boll. l. G-t. Ser. i. The Trentwi criMid, OtUwacrinua, W. R.

BilBnta— by F. A. Bather.
CmI. 5ir. «. Note o« Meroctiaua, Walcott— by F. A. Bather.

■JSLr" j*^'?**5^?* "* HeWont teeth at Roche

Gwrf. &r. ^. Notea on Cyclocyit«ii»-by P. E. Raymond.

■TxlL "^ «»■??*■«' and old TriWiitea in the

,« . „**»<*•• Memorial Mueum— by P. E. Raymond.

^*^^- *• ^OMcriptioa of aome new AaapUda^-by P. £.-

Raymond.
C-i- Sir. 7. Two new qjedea of Tetndium— by P. E

Kaymond.
Gta.S*rg. RevWoa of the neciea which have been tefened

to the maa Bathyurus OireKminary report)— l>y P. E.

Raymond.
GMl.Ser. 9. A new Braehiopod from the baae of the Utica—

by A. B. Wifaon.

■^Z:J^- ^ .yy.yy* "* *eptjiedonoua plant from the
TjBTthfy of Kettle rl*«r, Britiah Columbia-4>y W. J.

^^^'j^ibwi. ^ *** *'**' ** Lq>Woatrobua-by W.

^^*'*;^ '?•• *">«•>">•«» '««•> Adama aound, Admiralty inlet.

».w^^^'^*''»»''!^*-*y**AA.Johii*o«. '^ '

F&.'Oattim^ """^ """^ "* Vancouver idand— by

^*^wJfIL ^- ^"i IP**? <^ «««>l'»«l«» from the Atlantic and
_, . P^fc ooaata of CaMda— bv W. H. Dall mmi P. Bartach.
••*'•_•*•',• ■»•, "y*»W« fcwrn Vaneouver island and Nova
Scoda— by C. McLean Fraaer.

^■*"?S:_?'- '• "^ •r'*?*W "* Blandford townahip,
Mn. R... , ,,_,*¥**^.?^25'' Onurio-by W. J. Wintemberv.
M«. Btnx. 2. 0^-^S^^c^ ofgj^ (micro^Mte) in the

*^*"''t^*i '*• Columnar •tnicture in limettone— by E. M.
Kindle.

G***- f*'-'^- Suppoeed evidences of subsidence of the coast
5? ,.V p™«>»wi«:lc within modern time— by I. W.
Cjoidthwait.

^^*^J^: /*•„ P* Pre-Cambrian (Beitian) of aoutheaatem
Bntidi Columbu and their correlatioa— by S. J.
Schofield. ■*

Geel. Ser. 17. Early Cambrian stratigraphy in the North
American CordiHera, with discussion of the Albertella
and related faunas— by Lancaster D. Burli^.

Mus.
Mus.
Mus.
Mus.
Mus.

Mus.
Mus.
Mus.
Mus.

CM. S4r. IS. A nrelimiiiary atudy of the variation! of the
^ications of Parastrophia hemipUcata, Hall — by Alice
E. Wilson.

Anthrof. Ser. 2. Some aspects of puberty fasting anumg the
Ojibwas— by Paul Radin.
Boll. 3. G«ol. Ser. 19. The Anticosti Island faunas— tty W.! H.

Btnx. 4.
Bull. 5.

Twenhofel.
CM. Str. 20.

Kenzie.
CM. Ser. 21.

The Crowsnest volcanics — by J. D. Mac-

BULL. 11.

Mus. Bull. 12.

A Beatricea-like organism from the middle
Ordovidan— by P. E. Raymon'l.
Bull. 6. Anikrop. Ser. 3. Prehistoric and present commerce among

the Arctic Coast Eskimo— by V. Stefansaon.
Bull. 7. Biol. Ser. 4. A new species of Dendragapus (Dendragaput
Obacunis Flemingi) from Southern Yukon Territory —
by P. A. Tavemer.
Binx. 8. Ced. Ser. 22. The Huronian formations of Timiskaming

region, Canada — by W. H. Collins.
Bull. 9. Anthrop. Ser. 4. The Glenoid Foasa in the skull of the

Eskimo— by F. H. S. Knowles.
Bull. 10. Anihrof. Ser. 5. The social organization of the Winnebago
Indians, an interpretation — ^by P. Radin.
Geol. Sler. 23. Physiography of the Beaverdell map-area
and the southern part of the Interior plateaus of -itiah
Columbia — by L. Reinecke.
Ceol. Ser. 24. On Eoceratops Canadensis noy., with

remarks on other genera m Cretaceous, aurned dinosaurs
— by L. M. Lambe.
Biol. Ser. 5. The double-crested Cormorant (Phalacrocoras
Auritus) and its relation to the Salmon industries on the
Gulf of St. Lawrence — hy P. .' Tavemer.
Ceol. Ser. 25. The occurrence of glacial drift on the Mag-
dalen islands— by J. W. Goldthwait.
Ceol. Ser. 26. Gay Gulch and Skookum meteorites— by

R. A. A. Johnston.
Anthrop. Ser. 6. Literary aspects of North American

mytnology — by P. Radm.
Ceol. Ser. 27. The Ordovician rocks of Lake Timiskaming —

by M. Y. Williams.
Geol. Ser. 28. Structural relations of the Pre-Cambrian and
Palseozoic rocks north of the Ottawa and St. l.awrence
valleys — by E. M. Kindle and L. D. Burling.
Anthrop. Ser. 7. A sketch of the social organization of the

Nass River Indians — by E. Sapir.
Ceol. Ser. 29. An Eurypterid horizon in the Niagara
formation of OnUrio— by M. Y. Williams.

Mus.

Btnx. 13.

Mus.

Bull. 14.

Mus.

Bull. IS.

Mus.

Bull. 16.

Mus.

Bull. 17.

Mus.

Bull. 18.

Mus.

Bull. 19.

Mus.

Bull. 30.