164 



GASTEROPODA. 



hollidayi, Meek & Worthen, 1860, (Nati- 



copsis hollidayi) Proc. Acad. Nat. Sci. 



Phil., Low. Coal Meas. [Ety. proper 



name.] 

 nodosum, Meek & Worthen, 1860, (Nati- 



copsis nodosa) Proc. Acad. Nat. Sci. 



Phil., Low. Coal Meas. [Ety. from 



the nodes on the surface.] 

 Tbkmanotus, Hall, 1868, 20th Reg. Rep. 



[Ety. trema, a hole ; notus, the back.] 

 alpheus, Hall, 1864, 18th Reg. Rep., Niag- 

 ara Gr. [Ety. mythological name.] 

 trigonostoma, Hall & Whitfield, 1875,Ohio 



Pal., vol. 2, Niagara Gr. [Sig. triangu- 

 lar-mouthed.] 

 Tbochita, Schumacher, 1817, Essai N. Syst. 



[Ety. trochus, a wheel.] 

 antiqua, see Xenophora antiqua. 

 carbonaria, Meek, 1866, Proc. Acad. Nat. 



Sci., Coal Meas. [Sig. pertaining to 



coal.] 

 Tbochonema, Salter, 1859, Can. Org. Rem., 



Decade 1. [Ety. troches, a wheel ; nema, 



a thread.] 

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



Up. Held. Gr. [Sig. thin, lean.] 

 fatua, Hall, 1867, 20th Reg. Rep., Niagara 



Gr. [Ety. mythological name.] 

 pauper, Hall, 1867, 20th Reg. Rep., Niag- 

 ara Gr. [Sig. paltry, poor.] 

 pauper var. ohioense, Hall & Whitfield, 



1875, Ohio Pal., vol. 2, Niagara Gr. 



[Ety. proper name.] 

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



Up. Held. Gr. [Sig. straight-sided.] 

 tricarinatum, Billings, 1859, Can. Nat. & 



Geo., vol. 4, Calciferous Gr. [Sig. 



three-keeled.] 

 tricarinata, Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., Corniferous Gr. The name 



was preoccupied, 

 umbilicatum, Hall, 1847, (Pleurotomaria 



umbilicata) Pal. N. Y., vol. 1, Chazy 



to Hud. Riv. Gr. [Sig. navel-shaped.] 



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



Up. Held. Gr. [Ety. proper name.] 

 Trochus, Adanson, 1757, Voy. Senegal. [Ety. 



trochus, a hoop.] 

 mwourienm, see Pleurotomaria missouri- 



ensis. 

 Turbo, Klein, 1753, Tent. Meth. Ostr. [Ety. 



turbo, a top.] 

 bicarinatus, Troost, 1840. Not defined. 

 dUumla, see Holopea dilucula. 

 guadalupensis, Shumard, 1859, Trans. 



St. Louis Acad. Sci., Permian Gr. 



[Ety. proper name.] 

 limatus, see Pleurotomaria lineata. 

 obesus, Shumard, 1858, Trans. St. Louis 



Acad. Sci., Up. Coal Meas. [Sig. 



plump in form.] 

 (?) obscura, see Holopea obscura. 

 tabulate, see Pleurotomaria tabulata. 

 tennesseerum, see Cyclonema tennesseense. 

 texanus, Shumard, 1859, Trans. St. Louis 



Acad. Sci., Coal Meas. [Ety. proper 



name.] 

 TurbonUla, Leach, 1826, Risso Eur. Merid. 4. 



[Ety. diminutive of Turbo, a genus of 



shells.] 

 swaltovana, see Aclis swallovana. 

 Tubritella, Lainarck, 1801, Syst. An. sans 



Vert. [Ety. turriiella, a little tower.] 

 stevenana, Meek & Worthen, 1866, Geo. 



Sur. 111., vol. 2, Up. Coal Meas. [Ety. 



proper name.] 

 Xenophoba, Fischer, 1806, Museum Demi- 



dovianum. [Ety. xenos, a log or body ; 



phoros, bearing.] 

 antiqua, Meek, 1871, (Trochita antiqua) 



Proc. Acad. Nat. Sci. Phil., Cornifer- 

 ous Gr. [Sig. ancient.] 

 Zonites, Montfort, 1810, Conch. Syst. [Ety. 



zone, a belt.] 

 priscus, Carpenter, 1867, Quar. Jour.Geo. 



Soc, vol. 23, Coal Meas. [Sig. ancient.] 



