146 



GASTEROPODA. 



Capulus, Montfort, 1810, Conch. Syst., vol. 

 2. [Ety. riipidiis, a coffin.] 



acutirostris, Hall, 1856, Trans. Alb. Inst., 

 vol. 4, A\^irsaw Gr. [Sig. sharp- 

 beaked.] 



auriformis. Hall, 1847, Pal. N. Y., vol. 1, 

 Chazy Gr. [Sijj;. ear-shaped.] 



parvus, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Coal Meas. [Sig. small.] 



triplicatui, Swallow, 1858, Trans. St.Louis 

 Acad. Sci., Coal Meas. [Sig. three- 

 plicated.] 

 Cabinaropsis, Hall, 1847, Pal. N, Y., vol. 1, 

 [Ety. from its resemblance to Carin- 



carinata, Hall, 1847, Pal. N. Y., vol. 1, 



Trenton Cir. [Sig. keeled or having 



ridges.] 

 orbiculata, Hall, 1847, Pal. N. Y., vol. 1, 



Hud. Riv. Gr. [Sig. orbicular.] 

 patelliformis. Hall, 1847, Pal. N. Y., vol. 



1, Trenton & Hud. Riv. Gr. [Sig. 



patella or limpet-shaped.] 

 CiiE.MNtTziA, D'Orbigny, 1837, MoUusques, 



Echinodermes, Foraminiferes et Pol- 



ypiers, etc. [Ety. proper name.] 



Prof. Jleek was fjf the opinion that 



the species referred to this genus 



from the pateozoic rocks more prop- 

 erly belong to Lo.ronema and other 



genera, 

 attenuata, Stevens, 1858, Am. Jour. Sci., 



vol. 25, Coal Meas. [Sig. drawn out, 



attenuated.] 

 parva, Cox, 1857, Geo. Sur. Ky., vol. 3, 



Coal Meas. [Sig. small.] 

 swallovana, Shumard, 1859, Trans. St. 



Louis Acad. Sii., Permian Or. [Ety. 



proper name.] 

 tenuilineata, Shumard, 1855, Geo. Rep. 



Mo., Chemung Gr. [Sig. fine lined.] 

 Chiton, Linmeus, 1758, Syst. Nat., ed. 10. 



[Ety. chiluii, a coat of mail.] 

 canadeims, see ^Metoptoma ('anadense. 

 carbonarius, Stevens, 1859, Am. Jour. 



Sri., vol. 25, Coal Jleas. [Sig. from 



the Coal Measures.] 

 parvus, Stevens, 1859, Am. Jour. Sci., 



vol. 25, Coal Meas. [Sig. small.] 

 Clisospira, Billings, 1865, Pal. Foss., vol. 1. 



[Ety. kh'io, to lock; spira, a whorl.] 

 curiosa, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. curious.] 

 CoNcnoPELTis, Walcott, 1876, Desc. New Sp. 



Foss. [Ety. conche, shell ; pelte, shield.] 

 alternata, AValcott, 1876, Desc. New Sp. 



Foss., Trenton Gr. [Sig. alternate.] 

 minnesotensis, AValcott, 1876, Desc. New 



Sp. Foss., Trenton Gr. [Ety. proper 



name.] 

 Cyclonema, Hall, 18.52, Pal. N. Y., vol. 2, 



[Etv. kuklos, a circle ; iuma, a thread.] 

 bellulum, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti (ir. [Sig. beautiful.] 

 bilix, Conrad, 1842, (Plcurotomaria bilix) 



Jour. Acad. Nat. Sci., vol. 8, Trenton 



and Hud. Riv. Gr. [Sig. woven with 



a double thread.] 



bilix rar. conicum, S. A. Miller, 1874,Cin. 

 Quar. Jour. Sci., vol. 1, Cin'ti Gr. 

 [Sig. conical.] 

 bilix var. fluctuatum, James, 1874, (Cyclo- 

 nema fluctuata) Cin. Quar. Jour. Sci., 

 vol. 1, Cin'ti Gr. [Sig. wavy:] 

 cancellatum. Hall, 1843, (Littorina cancel- 



lata) Geo. Rep. 4th Dist. N. Y., Clin- 

 ton Gr. [Sig. cancellated.] 

 commune, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. common.] 

 concinna. Hall, 1876, Illust. Devonian 



Foss., Chemung Gr. [Sig. beautiful.] 

 crenistriatum, Hall, 1876, lUust.Devonian 



Fo.ss., Schoharie grit. [Sig. having 



wrinkled striae.] 

 crenulatum. Meek, 1871, Proc Acad. Nat. 



Sci., Cornif. Gr. [Sig. crenulated.] 

 decorum, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. seemly.] 

 elevatum. Hall, 1868, 20th Reg. Rep., Ni- 

 agara Gr. [Sig. elevated.] 

 hageri, Billings, 1862, Pal. Foss., vol. 1, 



Trenton Gr. [Ety. proper name.] 

 hallanum, Salter, 1859, Can. Org. Rem., 



Decade 1, Black Riv. Gr. [Ety. proper 



name.] 

 hamiltoni:e, Hall, 1862, 15th Reg. Rep., 



Ham. Gr. [Etv. proper name.] 

 humile, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. poor, 



small.] 

 liratum, Hall, 1862, 1.5th Reg. Rep., Ham. 



Gr. [Sig. furrowed.] 

 mediocre, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. ordinary, 



middling.] 

 montrealense, Billings, 1862, Pal. Foss., 



vol. 1, Trenton Gr. [Ety. proper 



name.] 

 multiliratum. Hall, 1862, 15th Reg. Rep., 



Ham. Gr. [Sig. many-furrowed.] 

 obsoletum, Hall, 1852, Pal. N. Y., vol. 2, 



Clinton Gr. [Sig. obsolete, from the 



nearly obsolete spire.] 

 obsoleta, Hall, 1876, Illustr. Devonian, 



Foss., Chemung Gr. The name was 



preoccupied, 

 percarinatum. Hall, 1847, (Pleurotomaria 



percarinata) Pal. N. Y., vol. 1, Trenton 



& Hud. Riv. Gr. [Sig. very much 



carinated.] 

 percingulatum, Billings, 1857, Rep. of 



Progr., Clinton & Niagara Gr. [Sig. 



encircled with manv lines.] 

 phffidra, Billings, 1865' Pal. Fcss., vol. 1, 



Quebec Gr. [Ety. mythological name.] 

 pyramidatum, James, 1874, Cin. Quar. 



Jour. Sci., vol. 1, Cin'ti Gr. [Sig. pyra- 

 midal.] 

 rugffilineatum, Hall, 1872, 24th Reg. Rep., 



Niagara Gr. [Sig. rugose4ined.] 

 semicarinatum, Salter, 1859, Can. Org. 



Rem., Decade 1, Black Riv. Gr. [Sig. 



half-carinated.] 

 sulcatum, Hall, 1852, Pal. N. Y., vol. 2, 



Guelph Gr. [Sig. furrowed.] 



