142 



PTEROPODA. 



centennialis, Barrett, 1877, Ann. Lye. 



Nat. Hist., vol. 11, Low. Held. Gr. 



[Ety. the one hundredth year, because 



the description was written in 187G.] 

 comnuunis, Billings, 1871, Can. Nat. & 



Geol., vol. 6, Potsdam Gr. [Sig. com- 

 mon.] 

 emmonsi. Ford, 187:5, Am. Jour, .'-ici., 3rd 



series, vol. 5, Potsdam Gr. [Ety. 



proper name.] 

 excellens, Billings, 1874, Pal. Foss., vol. 2, 



Potsdam Gr. [Sig. excellent.] 

 gibbosus. Hall, 1873, 23ril Peg. Pep. N. 



Y., Potsdam Gr. [Sig. giblious.] 

 impar. Ford, 1872, Am. .hmv. Sci., 3rd 



series, vol. 3, Potsdam Gr. [Sig. un- 

 equal.] 

 ligea. Hall, 18(i3, (Theca ligea) 1.5th Ee^. 



Rep. N. Y., Up. Held. Gr. [Ety. 



mythological name.] 

 micans, see Hyolithellus micans. 

 primordialis. Hall, 1861, (Theca ])rimor- 



dialis) Geo. Rep. Wis., Potsdam Gr. 



[Sig. first in order.] 

 princeps, Billings, 1871, Can. Nat. & Geol., 



vol. G, Pdtsilaiii I ir. [Sig. primitive.] 

 principalis. Hall, 187(i, lUust. Devonian 



Foss., Schoharie Grit. [Sig. principal, 



large.] 

 striatus. Hall, 187(1, lUust. Devonian Fn.^s., 



Ham. Gr. [Sig. striated.] 

 Ptehotheca, Salter, 1H52, Rep. Brit. Ass'n. 



[Ety. Pin-nllii'fii, a winged llu'ca.] 

 anatiformis. Hall, LS47, (Tellinomyaanat- 



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



Gr. [Ety. like an Amdifa.l 

 attenuata. Hall, ISiil, (Clioderma atten- 



uata) 14th Reg. Rep., Trenton Gr. 



[Si'-', drawn out, attenuated.] 

 canaliculata. Hall, 1861, 14tb Reg. Rep., 

 • Trenton Gr. [Sig. channeled.] 



expansa, Emmons, 1842, (Delthyris ex- 



pansus) Geo. Rep. N. Y., Black Riv. 



& Trenton ("Jr. [Sig. spread out.] 

 saffordi, Hall, lS(il, 14th Reg, Rep., Tren- 

 ton Gr. [Ety. proper name.] 

 transversa, Salter, 1S.)2, Rep. Biit. Ass'n, 



Hud. Riv. (ir. [Sig, crosswise.] 

 undulata,_ Hall, 1861," 14th Reg. Rep,, 



Trento'n Gr. [sig. wavy.] 

 Pugiiotculiia nnileatiix. sue Theca aouleata. 

 ScENEi.L.\, Billings, 1.S73, Can. Nat, t*t Geol. 



and Pal. Foss,, vol. 2. [Ety, m'nc, a 



tent; (7/f(, diminutive.] 

 reticulata, Billings, 1873, Pal. Fnss,, vol. 



2, Huronian <ti'. [Sig. like net-work.] 

 retusa. Ford, 1873, Am. .Joiir. Sci. t*c Arts, 



3rd seric's, vol. .5, Low. Potsdam Gr. 



[Sig. blunted.] 

 Stenotuec.v, Hicks, 1872, Quar. Jour. Geo. 



Soc. [Ety. slenos, narrow ; Tlu-cn, a 



genus of Plcro]iods.] 

 pauper, Billings, 1S74, Pal. Foss. vol. 2, 



Huronian Gr. [Sig. impoverished.] 

 Tentaculites, Schlotheiin, 1820, Petrefacten. 



[Ety. /('H/(/c»/ion, a feeler; lilhos, stone.] 

 arenosus. Hall, 1876, Illust. Devon. Foss., 



Oriskany sandstone. [Sig. sandy.] 



attenuatus. Hall, 1876, Illust. Devonian 



Foss., Ham. Gr. [Sig. attenuated.] 

 bellulus, Hall, 1876, Illust. Devonian 



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

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



Clinton Gr. [Sig. distant.] 

 elon,gatus. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. lengthened.] 

 fissurella, Hall, 1843, Geo. Rep. 4th Dist. 



N. Y., jMarcellus shale. [Sig. a little 



cleft,] 

 il'.riKiai, see Conchicolites flexuosus. 

 'hoyti, AVhitc, 1S76, Proc. Acad. Nat. Sci., 



Devonian. [Ety. proper name.] 

 gyracanthus, Eaton, 183.2, (Echinus gy- 



racanthus) Geo. Text-book, Low. 



Held ( ir, [Sig. round spine.] 

 incurvus, Shumard, 1856, Geo. Rep. Mo., 



Trcntun Gr, [Sig. incurved.] 

 irrojiihriH, Hall, 1859, Pal, N, Y,, vol. 3, 



svn, for Tentaculites gyracanthus. 

 minutns. Flail, 1843, Geo. Rep. 4th Dist. 



N. Y., Clinton Gr. [Sig. small.] 

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



Niagara Gr. [Ety. proper name.] 

 ornatus, Sowerby, 1839, 3Iurch. Sil. Sy.st., 



Water lime Gr. [Sig. adorned.] 

 oswcgnensis, 'Sleek & AVorthen, 1865, 



Proc. Acad. Nat, Sci, Phil., Cin'ti Gr. 



[Etv. I'n.iper name.] 

 richnioiidciisis, S, A, Miller, 1874, Cin. 



(^lar. Jour, Sci., Cin'ti Gr. [Ety. 



propter name.] 

 scalarit'ormis, Plall, 1876, Illust. Devonian 



Foss., Up. Held. Gr. [Sig. like T. 



.^ca/ar/.s,] 

 scalarh, Srldotheim, 1820, Petref. t. 29, 



Cornif. <Tr. [Sig. like a ladder.] Not 



an An]erican species, 

 sicula. Hall, 1S76, Illust. Devonian Foss., 



Up. Hehl. Gr. [Sig. a little dagger.] 

 spicula. Hall, 1876, Illust. Devonian 



Foss., Chemung Gr. [Sig. a dart.] 

 sterlingensis. Meek & Worthen, 1865, 



Proc, Acad, Nat. Sci. Phil., Cin'ti Gr. 



[Etv. ]>roper name.] 

 subtilis, "Winchell, 1866, Rep. Low. Pen- 

 insula Mich., Ham. Gr. [Sig. very 



slender.] 

 tenuistriatus. Meek & AVorthen, 1865, 



Proc. Acad. Nat. Sci, Phil., Cin'ti Gr. 



[Sig. finely striated.] 

 Theca, Sowcrbv, 18 45, Morris' Memoir 



Strezelscki's N. S. AA'ales. [Ety. a 



sheath or case.] 

 aculeata. Hall, 1860, 13th Reg. Rep., 



Plam. Or. [Sig. sharpened.] 

 gregaria. Meek & Hayden, 1861, Proc. 



Acad. Nat. Sci. Phil., Potsdam Gr. 



[Sig. occurring in masses.] 

 ligea, see Hyolithes ligea. 

 parviuscula. Hall, 1862, Geo. Rep. Wis., 



Hud. Riv. Gr, [Sig, very small.] 

 prlmonlidlis, see PIvolithes primordialis. 

 ti'la>-,,-/iil,,rit<, Hall, 1847, Pal. N. Y.,vol. 1, 



Hud, Riv, Gr. This name was pre- 

 occupied by Portlock in 1843. Billings 



described it as Hyolithes americanus. 



