IMAGE EVALUATION TEST TARGET (MT-3) y / / O it. m^ 1.0 I.I 1^ I4& M 1.8 1.25 1.4 1.6 ^ 6" — ► ^ PVintnoTPnhir Sdences Corporation 23 WEST MAIN STREET WEBSTER, NY. 14580 (716) 872-4503 ^t^ tnAthode normale de filmage sont indiqu^s ci-dessovr gauche, de gauche i droite. et de haut en baa, en prenant le nombre d'images n*cessaire. Les diagrammes suivants illuatrent la mithode. ata ilure, a 1 IX 1 2 3 1 2 3 4 5 6 ' H. M. Ami. CO'.'.. Separates A>W^ :ull(!tinU.S.(jleol. Surv., No, 30, Washington, lcS«G), is too important, and he is too desirous " to establish," as he says, " on a flrni stratigraphic and palaeontologic basis, the Cambrian system of the continent," not (343) / 344 to holp him by pointing out errors in " tiiose preliminHry studies," !is lie calls them, adding candidly that he "will be glad to have his attention called to them."' It is in answer to his demand that I will call his attention, first, to "the us(! oC tiic name Tuconic ;" anil later, in another paper which will promptly Ibllow, on " the Taconic of Georgia, Vermont." ]\Ir. Walcott has a long explanation entitled : "On the use of the name Taconic," in his " introductory observations" (see p[). 05 to 71), whei'c he tries to show why he is " compelled to use C'lunbrian in preference to Taconic." Mr. Walcott says that the fauna puhlished in "his paper is the fauna of the Upper Taconic of Enmions as defined by him in 1855 ;" moreover, he admits that "Dr. Emmons was correct in classifying the Upper Taconic as Pre-I'olsdam ;" aiul further he says that " Dr. Emmons deserves great credit for the work that h'i did." Yet notwithstanding all those friendly admissions of the discovery and value of t!ie Taconic system, and the singular state- ment tiiat the lower division " will ^;e dropped entirel} ;" and that " the Upper Tacor.ic which," according to JMr. Walcott, "is not now known to occiu' in the Taconic area, would be taken as the true Taconic, which it does not appear to be, although Dr. J^mmons in- cluded the Bliifk Slates in it in 1847;" farther on he adds, "it is one of the misfortunes of his (Dr. Emmons) career that he began liis work on the Taconic system in the Taconic area, instead of Western VeriMout or along the Hudson river, etc." Itlmmons, on the contrary, ought to be highly complimented, because he first worked out, in adifflcult part of the country, the arduous and niost impoi'tant i)ro'.'lem '^'' finding an immense system of strata below the Potsdam., coll- .ng stratigraphic and palaeontologic proofs at and near the Taconic range. The name is excel lenc in all re- spects, being indigenous, a beautiful Indian denomination, indi- cating a range of mountains well defined, where the first observa- tions were made, and is as appropriate as the Jurassic, from the .Turn mountains. As to the Taconic area not being truly Taconic, and "that most, if not all. of the strata included by Emmons in his original Ta- conic are of Lower Silurian age," Mr. Walcott, by his own researches » Scr.oml Ciiiitnbiilioii to tlii' Sliidit'S, etc., on \i\>. JS, fjlt .-mil U'). ■••»,• • • ...■..',• < • . • • • •/ • . . • It • « a 345 of 188G, knows now thai these are only erroneous notions put for- ward by the " united opposition of Enunons' contemporaries." Tiie use of the name Taconic is a very simple question. It rests entirely on priority. Barrande has demonstrated, as far hack as 18G1 , that it was in the Taeonic system, that the primordial fauna was (irst discovered in 1844, and, conse(iu8ntly, that the American name has precedence over all other names. It is a creed amon^ geologists, a creed which lias just received a new sanction and acknowledgment at the meeting of the Com- mission for the uniformity of nomenclature of the International Geological Congress at Geneva, in August last, that no system of stratilie>l rocks is acce[)ted as indcix-ndent and separate, unless it contain a special fauna. Sedgwick did not lind a single fossil in the lower part, of what he ('ailed, in 18;55, the Cambrian sys- tem, and he had no right to include it in the Cambrian. We have there two systems of strata as well marked and separated as any of the diflercnt systems in existence in our classifications. The Taconic system is the only TermJa or division of the sec- ond order that can be claimed by American geologists in the gen- eral classification of the strata of the world ; and to surrender it it into the hands of the English is to give up the only claim we have to be recognized as original discoverers. Certainly, we shall preserve also all the classifications of the divisions of the third (divisions), fourth (groups) and lifth (beds), ord';rs si)ecial to America ; and on that account there is not the smallest danger to be appreheniled of their being su[)[)ressed or sui)erseded by European geologists. But it is a patriotic duty for us Americans to preserve and keep religiously, the fact that here, among the mountain ranges which separate the Hudson river and Lake Champlain from the Connecticut river and the Green mountains, the great system, containing the Primordial fauna, was lirst discoveretl, pointed out and named. Mr. Walcottuses repeatedly the name Ordovician as a synonym or substitute for Lower Silurian (second fauna) conlining the name Cambrian to the Taconic or Primordial fauna horizon. It is an unfortunate introduction of a very recent name, for strata well defined and named in Amorii'a many yeai's previously. Doctor Emmons in his remarkable classification of the Palaeozoic strata of the State of New York in 1812 and 1S4G,' called '• Champlain i Ci'nlojiy of Now >'ork. I'idl u. p. U'-'. anil Af^riruliiirc of Sow ^Ork. \»l. i. [i. 11"). Albany. 1S12-1(;. 34(5 liUlc »ll«iivtion .ml corroct.on » o «•"'" ° P ,,,„ ,,,t»„„. He ;,„, U. other gteat V'^;-"-'^^!:^ ^^u o^ «.e Goo.og- »„,.,tl,:a like tl-"viB.«.» ■'; '^l- ;;^,^\„ ',,„„.,vl.l„ tl,o Ne» ical Sn,v,.y of N«v Y''" ' , , , ,o.,..r»l,hK-.l nan.cs wind, l,c Vo,k sj stcu, or rock, l.y .'n loj n s « = ^^_^^_,,^,,^ „ 1,;„1 lolUHl liscf"! SCologU-ulb.-^'-'l'"""' uaul every wlicio. Veriiouil in his celchralca The nan,e Chann-lain was "f ' \ ,.;;^";,„,,,,„,-,;„e, * P.lm- JVC. .,«■ i. ,.c,™Hri/».« .'«» '•" " ; ';^'! , :/„tc, (Bullclin Sue. GM. de France, ton.e ,v p. WC, » ^^," ' „^. i„ „„,„e,.„n» ,,„„„.„, for U.e Lower S n,.. m c>e,^^^^^^ ,^^^^ ^^^ ^^ ^_ /^, anc, ^ •:;;7;«17'i:Cor.ti™p.-e-'« L",;'^ f,„„„i,an.1 .lesirons of ef- nuKle, into Pri.nov.lial, "-<•- ^_ ^, 's , iek' , antl Mnrehison's, fecting a sort of eonn..«n.- » - ^;' =^. ^,,_ ,,„,„ 0,,,ovieia tl,e classilications ,ro,u«l en ncU ^^^^^^,^^ ^,^^ ^^,^,„ „, -!:™r^;';5:e cirU..Se^-.-X?^^ -^^::^rnXrr?:ff «-.---• January, 1879, Dec. u, Vol. J^^^^Lo. Lapworth ignores all 1„ nuiking such a l>voi^«f «" ^ ^'*^^:; g^,; ,i„. He not only 1-vions cl-^«^f "-" tu :r^;:onn>ly with ti^e law puts a.iae all quost.on. ol , o ^^^^^ ^^^^^ ^^^ ^^^^ ^.^^^ ^j" U. that a system cannot ^^'\^'^''^''^l j,, j-^^,t the propos,- discovery, characton.ea by ^J^J^, palaeontologlcal evi- tion is made against all '^]^^^^2:rouLrUs.u^^n.,ori.nt dence, and without a.y vegavd to ^^^ .^„^i,, ,,onld discoveries nnvde in AnKn.ca. ^^^^ ^^^, ,,iy ,c infringed, ^^- strata l.ave,^>.^.^^^^^^^^^^^^^^ nor even l>y ^^^"^"^';^"^- ' Sedellini regretted such action, if it would i)ostpone the completion of the European map. M. Hauchecorne said it would not, as the map would be completed without waiting for the deter- mination of the names." "The motion was then put and carried." (See "The work of the International Congress of Geologists and its committees," published under the direction of Persifor Prazer, page 24 and also pages 57 and 58, 18SC, no place of pul)lication.) From this quotation it seems that two English geologists, Mr. A. Geikie representing the Murchisonians and Mr. T. McKenny Hughes representing the Scdgwickians, backed by an American geologist, Mr. .lan.cs Hall, r('i)resenting "the united ojjposition C)f Dr. Enunon.s' contemimraries," succeeded in preventing the Berlin's International Geological Congress from voting and rendering justice 34J^ eonic wouia have be.n earned h^ ^-^ ^^^J,,,,,,,,, of Iho Co,n- ,,o,osilu.n nuulc by Trol. ^- "^^l^^^^,,,. To say that the nislio.. for ilH. i.nilof..nt,y ol the n o m « .^^ ^^.^^^ ^,^^ Silunan is nuunly an »^'>^^'^'^.;^'; ^^^ ^^U uu.tin, have sulh- ''U>ua u>urn.urs" of ^^^ '"-"';" ^^^^^',,,Uou is cosuu.polite a.ul ^r:i::;riw^^^^ -> -^^'^'^ investigate and -I'^^^i^^l^jr^uention to - A geological n.ap I" this ---^'-./^''^^ ^ HitohcooU, puhli.h..a lnU.ly >n th. of the United fetat^'s b> L- n . ^ji,,-,,,.^ KnguuH-rs,' Transactions "^^^^ f ^^'^^^^^o-ing ''to ninstnUe U>c November, 1«««^, Vol. '^ '^ ;';'.,,„, ,,,onunenao. I by the In- .ehemes of -^"-^!-;^;; . :: l^'^l. that n,ap Frol^ssor Hitch- ternational Ceolog.cal ^;^"-\^''- . Con.n'ess,in using the name eocU ha. anticipated the ch^^um <^^^2..^ ^^ ,,,. u. second Can,bvian and placing undei on >st ,^,^^^ ^^^^^^^,^^^ ^una and the thlnl t^--^ ' l^^;. ^^^^^ L,,er Palaeozoic rocks has postponed the snbjeet of nanun^ " '•"'"^^*" '^''- '• ': , .t.lo.ue or geological >.un.« o '^"'^ •^; ,„, j„„„ uelknai- ,,,,.,.p,., AM..ru a, a .. ;,,,^,,,^,, „,aev; by -'ulo ;'; ^;^; ,„„isl,.a vdaUnK ,:5-issi n. goo u u ^^^ ^ _^^^__^^_.^^^_, ^^^,.^ ••'"f r. ; !; um.t ...c« aueuamg as jr;:;a:;e;r,.a>{o.;...e....^;^.>^^ i„ch. of th. larger >"' ^^^ ,^ ,,„,„u,,i w.in .be large "-1 ■ '^c a" ^ ,^^ ,,i,,,, ,i,Ut Hbeels ...ay«. - •;'^;;' .^on of tl.e colore, .be «^""7 '" :,^' ",, ,,,„Us. The „.„„encla....e. tbe ^ ""«/ \ ' .^ograpbieal clist.ib.U.o.. ol Uu !=>' ,„„ ^,. .„ ,,„er o. ^vb..•b ^ ^'^ ;.,„ J, „„, ,.„ late IV-r •^-"-;;;^ J ,'„ Mapo.e.a. '"■ ''^"'"'" '" it v' B .."t foun.l ..mil too late .or '- —J ^^ „, „„ Ma,.o.e,a. uialevial o\ti i^" „ ,. ^i,.. | itcbcnclv at unci i^si.col tbei.iaps, :~Hi^':::;-.^""^ ^ „„a,e Geology of Vcr„u...t." ail) until tlio mooting in England in 1888. It, lias only iiccoptpd tho groups nun)l»(«ro(l 1 (i)iinior(Iial liiuiia), .') (sccrmd fauna), and 6 (third fauna) ; showing that tho Congress was dott;nninyd to have three systems, and not two as given by Mr. Ililchcock ; and that the Geological map of Europe, for which the classilication is made, is going on, according to M. Ilanchecorne, withont waiting lor the determination of the names, hut u.sing only the luimbers 1, f) and 0. It is to i)e regretted that an American geologist, against the de- cision of the lierlin Congress, has taken upon himself to anticipate and foreshadow what the Congress may aeee|)t as a solution ; and more than that, has put aside ail Americanclaims of priority to name the great zone of the Primordial fauna. If Professor Hitchcock had said on his map and in the explanatory text that the colors and names were only provisionary dimvisoire) as it is marked at the head of the "color-ficale tor the geological general maj) of Europe" (see at the end of Dr. Frazer's pamphlet on tiie International Congress at Berlin), it would have been more in acconlanee with the results arrived at by the Connnittee upon uniformity of nomenclature. The following table expresses in a condensed way, easy to read, all the principal views entertained in regard to the classification of the Lower Palaeozoic rocks in Europe ica. All data refer to memoirs and works well known ' ested in the ([uestion. A list of them is subjoined. At the beginning, geologic iiiethodj vvei d tho first observers, like .Sedgwick, Murchisou, Emia- randc had to make their way, with more or less of accuracy, .. , problems entirely now; and in using tools which had been tried, until then, only on the more recent formations. That some mistakes were made i? certain, and it is a wonder that they are no more numer- ous ; human passion, i)ersonal rivalry and jealousy, also added to the already very complicated (juestion. But now, we can bo more just and give credit where it is deserved. Priority of discoveries must stand first, and i)ass before anything else ; and it is for us to cor- rect the mistakes and injustice! of our i)redecessors and contem- poraries. If we do not do it now, it will remain for our successors to give due credit to all the great discoverers and classificators of the history of our planet. It is simi)ly a question of time. The facts are now well exposed before the geologists of the 350 ""'"■■'■ """ »» :';•" ''''TleU 1,^1 y»tcn« a,„o..s «..■ -trata ,.„,K.. T1.C exi.U.„.e ol «f .!''""/ ,„,„„ i, „„ ,„„,-. to l.e tare of the eurth's history. .,,,,,,,, terns, whose in.Uviaiuilily Sedgwick'. Cambrian .onn.r...e t-o ^.N^ ; ,„ ,„« c.ists i« now re.o.ni.oa au" ° ^ , ,,„ i.,i,„o,aial „,• the diseove,,- of -I"' 'l'-""- '•'•;':,,'":» o. ,.,:,« ota-ic ,„„„a „u,st he aceep.ed as a ""; " "'"_^,;;:' .,i„„, of u,e primi- live Cainhliaii of Sedgwick, and its n.imc o Bede Ca.ohrian w.th its donble "'".•'"'"S; ,„„„,. jivi„on l„m add that «■"■»»"» '''"-'"X; no e than . division of of the Ca,nhrian of S-'S"-'' ) ', ;* ...r: ,„ata of the second the third order, a system or « e t S JP^= „,. „„■,„„, even order. He knew no fossds then, and U.u c ^^^^ :u.ati,rapir,eany,thenrstd,sc^^^^^^^ ::;;:: t'lr^r S-r 'r: Geo.o.y of now Vork, Vart .., '■ ^X^;:^^^'-^ paiaeonto,o.iea,iy K,nn,o„s has priority 851 In CHllin- all the Umrv rocks .f tho pulueo/oic and buse <,r tl.o K'.eut Hor.eK of ntrnta, tl.o '/'cicon/,; S;,.te>u, ;u(bni„.,r tl.en, t,. u ..stem uu.l not to usulKlivision of a system as Soilgnck wron-Iy .li,| MuicliiHon in clainnnj. the rocks of the Scco.ul ruima-u.ui even tl e greatest part of llic Primordial fauaa-as l..longi„« to tb.t,uu.ian, has commit. ocl prccisoiy the same sc.entiHe error us Scdgw.ck, putting two systems into one. Palaeontology has pnt unend to tha discussion ami to the tendency of hoth Sed.rwick an(, Murch.son to monopolize two systems. It has found u^soUi- t.on editable to U.e two adversaries, an.l at the same time "to u th.n observe . Knunons, .vho without clai.ning anything, has found the Primordial fauna, the very base and llrst step of Pal aeontology itself. Oidovician is absolutely valueless and creates a confusion with- out any compensation. Jts author has i,ut it forward on the triv- >Hl objection that the two opponents - Nedgwick and Murchison- bcn.g both wrong, a new name was desirable ; and Prolessor I .,>. worth chooses a Welsh name, without consideration of the cl ,il ether of foreign geologists or foreign geology. Priority was set a«ul., and without any .egard to the name of Champlain ..ro.il, used ,n America since 1844 -a fact which he seems to i-niore-he has not hesitated in offering as a solution o; the riillicurtv, a new imme whose only merit is in being Brit..].. American geolo-nsts know well what is meant by Champlain group or Trenton f-uu.a uu( to replace it now by Oidovician, when we try to give credit am approve the claims of the distinguished authors and i,ioncers ot the discoveries made in the Lower Palaeozoic rocks of the world, cannot be allowed. Thc.e is confusion enough without it Let us be content with the names offered in I«35 and 1«44 bv tJetlgwick, Murchison and Kmnions. In fact, to Sedgwick we owe the Canibriuu, limited to one fauna p.'Oved by liarrande to bo the Hecond fauna; to Murchison wj owe the ,bV/«,7u«, limited to the Third fauna; and to Emmons we owe the 2'a^'ou/c comi)rising Ihe Primordial fauna. American geologists have the rigiit of priority in the Taconic system, and also they have priority in the name of Champhu-i over Ordoviciaii offered lately by the Knglish. 352 o o N o :: o s H b< O O o is O U3 o 'J c s coon 5 - ^ c S6 I i .— -< » ga "^ u e '. ." ' .55 J » =~ 5 -r ^ 5 S -7. ? •" 5 ■" - i^ . .= II ^ ;') c i * — '^.■R I ^1" a 5 o 'li i; O c •ii H O 'T < ^1 O l^i ,T u* CO tfl .— « X ^ u ,^ u •/■, "T a s> L-: /. o i § 'X H - ■t;;' -c •- - C ^ rK u O h •^ ^ to , '/J i- \f b o 1 •VN.lVd (IIIII'X r =;j 2= J- tc-r T^ _ X p: j=,= — o .5 s 5 S S— ^ U - c = U /' P X :-i t/.' 5. ^ — •VN.lva ll.siU.f.lb ^8c «H=- c||3 I = = •: -.5 ^cfi II §_ ::" = o "^ii = S"a:5SiS_ : o « Bi « ■- -} X = y '^ .^ i i' ^ X « 'S tij — ' — -r; ^ « ' • ^ — J3 — x: ■^, b - , = I '". i 2J £ r. c; £ ? •r o =2 ' = > (/. rt 5 — c ' ^ w '■■— ^ I- ''• *^ e -- ■ - "- - o 5 ~ - S K I 'C S ,- , m cj = a -J >.p . 5.« o = t. . = it- 5 = J2l^<5l_^^^a •VK.lV.l IVUllKiKllI.I 'H> I.SHIJ 35;^ i LIST OF BOOKS AND PAPERS CONTAINING THE HISTORIC CLASSIFICATION AND THE ORDER OF DISCOVERIES. BAURANDK (JOACIIIM). 1840. Notice pr61imiiitiirc siir le Sy.stcini; Silurien et les Tribolitcs de Boliuiue. Hvo, Lcipzif?. Priniordhil fauna. Nouveaux Tribolites ; supplement a la Notice prC'liniinaire sur le Systenie Silurien et les Tribolites de Bolu'nie. 8vo, Praj^ue. 1851. Sur le terrain silurien du centre de la Bolii-me (Bullcti)i Sue. (j!:ol. de France, 2e .'07). 1852. Systeme Silurien du centre de la Boliemc (Vol. i, text and plates Tribolites). 4to, Prague. 1856. Parallele eutre les depots Siluriens de Boheme et de Scandinavie 4to, Prague. 1857. Extension de la I'aune Primordiale de Boheme (Bidletin Soc. geol. de France, 2e s6rie, tome xiv, p. 439), Paris. 1859. Etat actuel des connoi.ssances acquises sur la faune Primordiale {Bulletin Soc. au ;il aout et du 2 au 4 septemlire, 1878, p. 101). 8vo, Paris. KM M O.V S ( KU K S KZ KU) . 1838. Report of E. Emmons, Geologist of ttie Second Geological District of the State of New York, pp. 1«5, etc. Documents of the 354 state of New York, No. 200, in assembly, Fehniary 20. Svo , Albany. {Snndstonp, of Potsdam, p. 214). In " .Second Annual Report of the Geolo^^ical Survey." 1842. Geolojjy of New York, Part ii, comprising the survey of the sec- ond jt^'ological district. -1 to, Albany. TJie 7WcrjHic (S'/zs^cju con- stitutes Chai)ters vii, viii and i\, pp. 13,"i-UJ4. No fo.ssils. 1844. The Taconic System, Ijased on observatio';.'- in New York, Massa- ciuisetts, Maine, Vermont and Rhode Island. 4to, Albany. Fos- sils found and described. 1840. Agriculture of New York, Vol. I. The Taconic. iSystcm, Chuptav v , with an appendl.x, pp. 45-109 and 112. 4to, Albany. 18").'). American Geology, Vol. i, Part ii, pp. 1-122. 8vo, Albany. 18r)0-60. Manual of Geology, llrst edition in 1859 and a second edition in 1800. 8vo, New York. LAPWOinU (ClIARKKS), 1879. On the Tripartite Classification of the Lower Palaeozoic Rocks (Ci'eoloyical Magazine, new series), J)ecade ii. Vol. vi, .January. 1800. XIARCOU (JULK.S). On the Primordial fauna and the Taconic system by .Toachim Barrande. With additional notes Ijy .Tules Marcou (Proceed, lioston Soc. j^at. Hist. Vol. \n, p. 309, October) Boston. In it the Potsdam sandstone is placed for the first time as the last terra of the Taconic, instead of being the lirst term of the Lower Silu- rian or Champlaiu. 1801. Sur les roches fossilileres les plus anciennes de TAmerique du Nord. In two letters to Elie de Beaumont, September, 1801 (Compti's rendns de I'Acadcmie des Sciences de France, tome mm, pp. 803 and 915, Novembre, 1801). Paris. The Taconic and Lower Silurian rocks of Vermont and Canada (Proceed. Boston Soc. Xat. His/.., Vol. viii, p. 239, November, isoi), Boston, one humlrcd separate copies printed, with a tille- l)age dated 1802. Liste additionelle des fossiles du terrain taconique de TAmC-rique dn Nord (Bulletin Soc. Gcol. du France. 2.e s6rie, tome xix, p. 744) Paris. Letter to M. Joachim Barrande on the Taconic rocks of Vermont and Canada, August, 1802, Cambridge, Mass. For the first time "lenticular masses of limestone" inclosed in the Taconic slates are recorded. Notice sur les gisements des lentilles trilobitifi^res taconiques de la Pointe-Levis au (\anada. (liulklin Sue. iji'ol. de France, 2e sCrie, tome xxi, p. 230), Paris. Sur les colonies dans les roches tacouiciues des bords du lac Chain- plain lyBulletiu Soc. yi'ol. de France, 3e sd-rie, tome ix, p. 18, Novembre, 1880), Paris. 1802. 1804. 1881 >•! / I 'J J * "! /I n 355 188.-. The Taconlc system anrl its position In stratigraphic Rcology. {Proceed. Ampri<^nyi Acatl. Arts and Sciences, n.'w series, vol. xii, p. 174), Cambridge, Mass. In it is found tlie correspondence of Emmons, Barrande and Billings. MAKU (.lOlIX K.). The cla.ssiflcation of tlu- Cambrian and Silurian rocks. Being the Sedgwick prize essay for the year 1882. 8vo, Cambridge. MUUCHISO.V (UODEIUCK I.). On the Silurian and Cambrian systems, exhibiting the order in which the older sedimentary strata succeed one another in Eng- land and Wales, by A. Sedgwick and R. I. Murchison (lieport British Association for 1835, p. 59). The Silurian system, 4to, London. Siiuria, 8vo, London. Siluria, Third edition, Svo, London. Siiuria. Fourth editlon.'svo, London. SEDGWICK (ADAM). Ordre de superposition et caracteres gCologiqucs des roches de Cumberland et du pays de Galles; extrait d'unelettre a Elie de Beaumont (Bulletin Soc. geol. de France, le serie, tome vir p. 152), Paris. ' Synopsis of the English series of stratified rocks inferior to the Old "ed Sandstone, with an attempt to determine the successive natural groups and formations. {Proceedings Geological Society of London, Vol. ii, No. 58, p. 675, London). A synopsis of the classification of the British Palaeozoic rocks. With a systematic description of the British Palaeozoic fossils in the Geological Museum of the University of Cambridge by Frederick McCoy, 4to, Cambridge, 1862-55. A catalogue of tlie collection of Cambrian and Silurian fossils con- tained in the Geologictl Museum of the University of Cam- bridge, by J. w. Salter, with a preface by Adam Sedgwick. 4to, Cambridge. The lower and middle Cambrian contain the Primordial fauna, collected and described since 18G3: twenty years after the discovery of the fossils of the Taconic system of Dr. Emmons, seventeen years after the description of the Primordial fauna of Bohemia by Barrande, and twelve years after Barrande's announcement of the existence of the Primordial fauna In Wales. WAI.COTT (CHAIil.KS D.). On the Cambrian faunas of North America. Preliminary studies {Bulletin United States Geological Survey, No. 10) Svo, Washing- ton. Second contribution to the studies on th^ Cambrian faunas in North America. {Bulletin United Stairs Geological Simey, No. 30.) Svo, Washington. SALEM PUKSS, September, 1887. " 1883. 183G. 1839. 18.54. 185!). 1867. 1836. 1838 1851-55. 1873. 1884. 1886.