178 



CEPHALOPODA. 



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



Trenton Gr. This name was preoc- 

 cupied by Schlotheim in 1820, and by 



Eichwald in 1840. 

 veterator, Billings, 1865, Pal. Foss., Cal- 



ciferous Gr. [Sig. old.] 

 vindobonense, Dawson, 1868, Acad. Geol., 



Carboniferous. [Ety. proper name.] 

 virgatum, (?) Sowerby, 1839, Murch. Sil. 



Syst., (Hall, Pal. N. Y., vol. 2,) Niagara 



Gr. [Sig. rod-like.] 

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



Clinton & Niagara Gr. [Sig. like a 



small rod.] 

 viitatum, Sandberger. Not American, 

 vulgatum, Billings, 1857, Rep. of Progr., 



Trenton Gr. [Sig. common.] 

 whitii, Winchell, 1863, Proc. Acad. Nat.' 



Sci., Kinderhook Gr. [Ety. proper 



name.] 

 winchelli. Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., Devonian. [Ety. 



proper name.] 

 woodworthi, McChesney, 1861, New Pal. 



Foss., Niagara Gr. [Ety. proper 



name.] 

 xerxes, Billings, 1865, Pal. Foss., Quebec 



Gr. [Ety. proper name.] 

 xiphia^, Billings, 1857, Rei>. of Progr., 



Trenton Gr. [Sig. having a point like 



a sword.] 

 Phragmoceras, Broderip, 1839, Murch. Sil. 



Syst. [Efy. phragmos, a partition; 



kero!^, a horn.] 

 byronense, Worthen, 1875, Geo. Sur. 111., 



vol. 6, Niagara Gr. [Ety. proper 



name.] 

 ellipticum, Hall & Whitfield, 1875, Ohio 



Pa'!., vol. 2, Niagara Gr. [Sig. ellip- 

 tical.] 

 expansum, Winchell, 1863, Proc. Acad. 



Nat. Sci., Kinderhook Gr. [Sig. ex- 

 panded.] 

 hector, Billings, 1862, Pal. Foss., Guelph 



Gr. [Ety. proper name.] 

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

 ara Gr. [Etv. mvthological name.] 

 parvum. Hall & Whitfield, 1875, Ohio 



Pal., vol. 2, Niagara Gr. [Sig. small.] 

 prsematurum, Billings, 1866, Can. Nat. & 



Geo., vol. 5, Black Riv. & Trenton Gr. 



[Sig. premature.] 

 spinosum, see Gyroceras spinosum. 

 walshi, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., Ham. Gr. [Ety. 



proper name.] 

 PiLOCERAS, Salter, 1859, Quar. Jour. Geo. 



Soc, vol. 15. [Ety. pilum, a pounder 



or pestle; keras, a horn.] 

 canadense, Billings, 1860, Can. Nat. and 

 . Geol., vol. 5, Calciferous Gr, [Ety. 



proper name.] 

 gracile, Billings, 1865, Pal. Foss., Quebec 



Gr. [Sig. slender.] 

 triton, Billings, 1865, Pal. Foss., Quebec 



Gr. [Ety. mythological name.] 

 wortheni, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Ety. proper name.] 



Polycroniies haani, Troost, 1840, 5th Geo. Rep. 



Tenn., Devonian. Not clearly defined, 



but probably a Gyroceras. 

 Ptekonautilus, Meek, 1864, Pal. of Up. Mo. 



[Ety. pteron, a wing ; Nautilus, a genus 



of shells.] 

 seebachanus, Gekiitz, (Nautilus seebach- 



anus) Carb. und Dyas, Permian Gr. 



[Ety. proper name.] 

 S^RicHxMTES, Billings, 1866, Catal. Sil. Foss. 



Antic. [Ety. sairo, to show the teeth ; 



ichnos, a footstep.] The author sup- 

 posed the tracks might have been 



made by a species of Cephalopoda, 

 abruptus, Billings, 1866, Catal. Sil. Foss. 



Antic, Hud. Riv. Gr. [Sig. from the 



more abrupt termination and deeper 



impression at one end than the other.] 

 SoLENOCHEiLUS, Meek & Worthen, 1870, Proc. 



Acad. Nat. Sci. Phil., vol. 20. [Ety. 



solen, a channel; cheilos, a lip.] 

 capax. Meek & Worthen, 1865, (Crypto- 



ceras capax) Proc. Acad. Nat. Sci. 



Phil., Coal Meas. [Sig. large.] 

 collectum, Meek & AVorthen, 1870, Proc- 



Acad. Nat. Sci. Phil., St. Louis Gr. 



[Sig. gathered together.] 

 leidyi, Meek & Worthen, 1865, (Nautilus 



leidyi) Proc. Acad. Nat. Sci. Phil., 



Keokuk Gr. [Ety. proper name.] 

 Spirula, Lamarck, 1801, Syst. An. sans Vert. 

 mortoni, Troost, 1840, 5th Ge" Rep. Tenn., 



Niagara Gr. Not cleai iy defined. 

 Streptoceras, Billings, 1866, Catal. Sil. Foss. 



Antic. [Ety. streptos, twisted; keras, 



horn.] 

 heros, BiUings, 1866, Catal. Sil. Foss. 



Antic, Niagara Gr. [Ety. mytho- 

 logical name.] 

 janus, Billings, 1866, Catal. Sil. Foss. 



Antic, Niagara Gr. [Ety. proper 



name.] 

 Temnocheilus, McCoy, 1844, Synop. Carb. 



Foss. Ireland. [Ety. temno, I divide ; 



cheilos, a lip.] 

 coxanum, Meek & Worthen, 1869, Proc 



Acad. Nat. Sci. Phil., St. Louis Gr. 



[Ety. proper name.] 

 latum, Meek & Worthen, 1870, Proc. Acad. 



Nat. Sci. Phil., Coal Meas. [Sig. wide.] 

 niotense. Meek & Worthen, 1865, Proc. 



Acad. Nat. Sci. Phil., Keokuk Gr. 



[Ety. proper name.] 

 peramplum, Meek & Worthen, 1865, (en- 



dolobus peramplus) Proc Acad. Nat. 



Sci. Phil., Chester Gr. [Sig. very 



large.] 

 spectabile, Meek & Worthen, 1860, (Nau- 

 tilus spectabilis) Proc Acad. Nat. Sci. 



Phil., Chester Gr. [Sig. showy, worth 



seeing.] 

 winslowi, Meek & Worthen, 1870, Proc. 



Acad. Nat. Sci. Phil., Coal Meas. 



[Ety. proper name.] 



