NORTH AMliRlCAX lNVEirrt:BRATE PAL2E0N I OLOGY. 577 



soni, Trematospira i)>frcqticiis^ RhyncltoncUa f occldens, R. [Leiorhynchus) 

 neradensis, Pentamcnts loti.s, Cryptonella f circula, G. pinoncnsis, Ptcrinea 

 neicarkcnsis, Lcptodesma transversa, Limoptcra sarmenticia, Mytilarca 

 duhia, ModiomorpJta altiformc, ^f. ohlonfja, M. obtusa, Xuciila resciiensis, 

 Dystactella insularis, Megambonia occidualis, JS^yassa parva, Grammysia 

 minor, SanguinoUtes f comhensis, S.f gracilis, Conocardiuni nevadensis, 

 Poridonomya laevis, P. divonica, Mivrodon {('ypricardella) macrostriatus, 

 Anodontopsis amygdalaeformis, iSchizodiis (Cytlierodon) orbicularis, Platy- 

 ceras cnnradi, P. undnlatum, P. ihetiforme, Euomplialus eurehensis, Eccu- 

 liomphalus devonicus, iStraparolliis neicarkensis, Plaiyschisma? McCoyi, 

 P. / ainbiguuin, Calloncma occidentalis, Loxonema curclensis, L. nobile, 

 L. approximatum, Bclleroplion perplexa, B. conihsi, Scoliostoma americana, 

 Mctoptomaf devonica, Colcolus laevis, Gomplioccras suboviforme, Cyrfoceras 

 nevadensc, Goniatifcs dcsideratus, Beyrichia {prlmitia) occidentalis, Leper- 

 ditiarotundata, Dalmanites meelcii. From 1 he Carboniferoiis fifty-one new 

 species are deseribed: Discinna connata, Spirifera anncctans, 8. desider- 

 ata, Riiynchonella eurekcnsis, R. tliera, Aviculopecten haguei, A. eureJiensis, 

 A. peroccidens, A. pintoensis, A. afjinis, Strebloptera similis, Crcnipectcn 

 hallanus, Pterinopecten hoosacensis, P.spio, Ptcrinea pintoensis, Ptychopic- 

 ria protoformc, Pinna incxpectaris, P. cosimilis, Myalina congeneris, M. ne- 

 mesis, M ncssns, Modiola ncvadensis, Modiomorpha ambigna, M. ? desiderata, 

 M. f pintoensis, Nucula insularis, N. Icvatiforme, Solenomya curta, Macro- 

 don truncatn^, Edmondia medon, E. f circularis, Plenroplwrns meeici, 

 Sanguinolitcs retusns, 8. simplex, 8. salteri, 8. ? naenia, 8. striatus, Micro- 

 don {cypricardclla)connatus, Cardiola ? JrMcostata, 8chizodvsdeparcus, 8. 

 curtiforme, 8. pintoensis, Platyceras occidens, P. piso, Platyostomainorna- 

 tum, Bclleroplion majusculus, Loxonema bclla, Plcnrotomaria nci'adensis, 

 Metoptoma peroccidens, Hi.olithcs carbonaria, Orthoccras etirekcnsis. 



The discovery in tlie Devonian of the interior of a dorsal valve of a 

 rather large species of Lingula, IJngnla ichitei, afforded the means of 

 compariison of the same parts of the shell with a Silurian and recent 

 species of this genns, and proves the great structural similarity of the 

 three species so widely separated in geological time. 



Walcott, C. D. — On the Cambrian Faunas of North Auieriea. l*re- 

 liminary studies. (Bull. U. S. Geol. Surv., vol. it, No. 10, pp. 283-354, 

 pis. i-x. Washington, 1884.) 



Tiiis work consists of three parts ; the first " a review of the fauna of 

 the Saint John formation, contained in the Ilartt collection." This 

 work is not meant to encroach on Mr. Mathew's work, and contains 

 merely illustrations and descriptions of s])ecimens in the Hartt collec- 

 tion belonging to Cornell University, and Mr. Mathew proposed speci- 

 fic names for the new species excepting one, Harttia mathcn-i, the tyi)e 

 of the n. g. Ffarttia Walcott, a very curious form belonging to the 

 (■•■thipfrccida'. The new species are Lingula f datcsoni ]\Iathe\v. llyolUhcs 

 danianiis, and //. micmac ^lathew. Conocoryplie iralvotH Mathew is 

 als<nne!!tiiau'd here (or the first time. The n(>w snl^geuus 8aUt'ri(i is pro- 

 S. Mis. 33 37 



