164 



GASTEROPODA. 



hoUidayi, Meek & Worthen, 1860, (Nati- 



copsis hoUidayi) Proc. Acad. Nat. Sci. 



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



name.] 

 nodosum, Jleelv & Wortlien, 1860, (Nati- 



copsis nodosa) Proc. Acad. Nat. Sci. 



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



the nodes on the surface.] 

 Tremaxotus, Hall, 1868, 20th Keg. Eep. 



[Ety. trema, a hole ; 'iiotux, the back.] 

 alpheus, Hall, 1864, 18th l!eg. Rep., Niag- 

 ara Gr. [Ety. mythological name.] 

 trigonostoma. Hall & Whitfield, 1875,Ohio 



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

 lar-mouthed.] 

 Trochit.v, Schniiuulier, 1817, Essai N. Syst. 



[Ety. trochnx, a wheel.] 

 aiilii/n(i, see Xenophora antiqua. 

 carbonaria, i\Ieek, 18GG, Proc. Acad. Nat. 



Sci., Coal Meas. [Sig. pertaining to 



coal.] 

 Trochonem.v, Salter, 1859, Can. Oi-l;. Rem., 



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



a thread.] 

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



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

 fatua. Hall, ISO", 20th Reg. Rep., Niagara 



Gr. [Ety. mythological name.] 

 pauper, Hall, lSi'i7, 20th Reg. Rep., Niag- 

 ara Grr. [Sig. paltry, poor.] 

 pauper rar. ohioense, Hall & Whitfield, 



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



[Ety. proper name.] 

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



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

 tricarinatum, Billings, 18..>9, Can. Nat. & 



<Teo., vol. 4, Calcifei-ous (Tr. [Sig. 



three-keeled.] 

 IrkaritiKta, Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., Corniferous (ir. The name 



was preoccupied, 

 umbilicatum. Hall, 1847, (Pleurotomaria 



umbilicataj 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.] 

 mi&iouriensis, see Pleurotomaria missouri- 



ensis. 

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



turbo, a top.] 

 hicariiialus, Troost, 1840. Not defined. 

 diliicida, see Holopea dilucula. 

 guadalupensis, Shumard, 1859, Trans. 



St. Loui.s Acad. Sci., Permian Gr. 



[Ety. proper name.] 

 lineatus, see Pleurotomaria lineata. 

 obesus, Shumard, 1858, Trans. St. Louis 



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



plump in form.] 

 (.'') obsciira, see Holopea obscura. 

 tabulata, see Pleurotomaria tabulata. 

 knnessseciuiix, see Cyclonema tennesseense. 

 texanus, Shumard, 1859, Trans. St. Louis 



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



name.] 

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



[Ety. diminutive of Turbo, a genus of 



shells.] 

 ttwaltorana, see Aclis swallovana. 

 TuRRiTELLA, Lamarck, 1801, Syst. An. sans 



Yert. [Ety. turritella, a little tower.] 

 stevenana. Meek & Worthen, 1866, Geo. 



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



proper name.] 

 Xenophora, Fischer, 1806, Museum Demi- 



doxdanum. [Ety. xcnos, a log or body ; 



plioros, bearing.] 

 antiqua. Meek, 1871, ('Trochita antiqua) 



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

 ous (xr. [Sig. ancient.] 

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



:one, a belt.] 

 prisons. Carpenter, 1867, Quar. Jour. Geo. 



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



