GASTEROPODA. 



155 



Orthonkma, Meek & "Worthen, 1861, Proc. 

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

 straight; nema, a thread.] 



conicum, Meek & Worthen, 1866, Proc. 

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

 a cone.] 



newberryi. Meek, 1871, Proc. Acad. Nat. 

 Sci. Phil., Corniferous Gr. [Ety. 

 proper name.] 



salteri, Meek &Worthen, 1860,(Eunema (?) 

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

 Low. Coal Meas. [Ety. proper name.] 



subtseniatum, Geinitz, 1866, (Murchisonia 

 subtaeniata) Carb. und Dyas in Neb., 

 Coal Meas. [Sig. somewhat banded.] 

 Orihonychia, Hall, 1843, syn. for Platyceras. 

 Gethostoma, Conrad, 1838, Ann. Rep. N. 

 Y. [Ety. orthos , straight ; stoma, 

 mouth.] 



commune, Conrad, 1838, Ann. Rep. N. 

 Y:, figured in 1841, Birdseye Gr. [Sig. 

 common.] 

 PALJEAOMiEA, Hall, 1873, 23d Reg. Rep.N. Y. 

 [Ety. palaios, ancient ; Aansea, an ex- 

 isting genus of shells.] 



typica, Hall, 1873, 23d Reg. Rep. N. Y., 

 Potsdam Gr. [Ety. type of the genus.] 

 PhaNbkotinus, Sowerby, 1842, Min. Conch. 

 [Ety. phaneros, aperture ; teino, ex- 

 tended.] 



paradoxus, Winchell, 1863, Proc. Acad. 

 Nat. Sci., Chemung Gr. [Sig. para- 

 doxical.] 

 Phragmolites, syn. for Gyrtolites. 



compressus, see Gyrtolites compressus. 

 Pheagmostoma, Hall, 1861, 14th Reg. Rep. 

 [Ety. phragmos, a partition, stoma, the 

 mouth ; from the septum within the 

 aperture.] 



cumulus, Hall, 1861, 14th Reg. Rep.,Hud. 

 Riv. Gr. [Sig. a heap.] 



cymbula, Hall, 1861, 14th Reg. Rep., Hud. 

 Riv. Gr. [Sig. a small boat.] 



natator, Hall, 1862, 15th Reg. Rep., Por- 

 tage and Ham. Gr. [Sig. a swimmer.] 

 The same species Hall identified with. 

 Bellerophon expmuus of Sowerby, in 

 1843, Geo. Rep. 4th Dist. N. Y. 

 Pileopsis tubiffr, syn. for Platyceras dumosum. 



vetu^lus, Sowerby. Not American. 

 PlanorUs, Guettard, 1756, Mem. Acad. Sc. 

 Paris. 



trilobatm, see Bucania trilobatus. 

 Platyceeas, Conrad, 1840, Ann. Rep. N. Y. 

 [Ety. platys, broad; kercw, horn.] 



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

 Low. Held. Gr. [Sig. pertaining to 

 the fields, coarse.] 



ammon, Hall, 1862, 15th Reg. Rep., Up. 

 Held. Gr. [Ety. mythological name.] 



angulatum, Hall, 1852, (Acroculia angu- 

 lata) Pal. N. Y., vol. 2, Clinton and 

 Niagara Gr. [Sig. angulated.] 



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

 Low. Held. Gr. [Sig. bent] 



argo. Hall, 1862, 15th Reg. Rep., Up. 

 Held. Gr. [Ety. mythological name.] 



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



Ham. Gr. [Sig. attenuated.] 

 attenuatum, Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., Cornif. Gr. This name was 



preoccupied.] 

 auriculatum. Hall, 1876, Ulust. Devonian 



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

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



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

 biserialis. Hall, 1860, Supp. to Geo. Iowa, 



vol. 1, pt. 2, Burlington Gr. [Sig. hav- 

 ing two rows.] 

 bisinuatum, Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. double-sin- 



uated.] 

 bisulcatum. Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. double- 

 furrowed.] 

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



Ham. Gr. [Sig. large mouthed.] 

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



Low. Held. Gr. [Sig. like a covering 



for the head.] 

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



Oriskany sandstone. [Sig. having a 



thick skin.] 

 campanulatum, Winchell & Marcy, 1865, 



Mem. Bost. Soc. Nat. Hist., Niagara 



Gr. [Sig. bell-shaped.] 

 capulus. Hall, 1860, Supp. Geo. Iowa, 



Burlington Gr. [Sig. a coiBn.] 

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



Up. Held. Gr. [Sig. keeled.] 

 cirriformis, Conrad, 1841, Ann. Rep. N. 



Y. Not clearlv defined, 

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



Low. Held. Gr. [Sig. club-like.] 

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



Up. Held. Gr. [Sig. concave.] 

 conicum. Hall, 1862, 15th Reg. Rep., Ham. 



Gr. [Sig. conical.] 

 corniforme, Winchell, 1863, Proc. Acad. 



Nat. Sci., Chemung Gr. [Sig. in the 



form of a horn.] 

 crassum, Hall, 1862, 15th Reg. Rep., Up. 



Held. Gr. [Sig. thick.] 

 curvirostrum, Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. bent-beaked.] 

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



Up. Held. Gr. [Sig. a small drinking 



vessel.] 

 cyrtolites, McChesney, 1859, Pal. Foss., 



Coal Meas. [Sig. curved stone.] 

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



Up. Held. Gr. [Sig. a plough share.] 

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



Low. Held. Gr. [Sig. dilated.] 

 dumosum, Conrad, 1840, Ann. Rep. N. 



Y., Up. Held. Gr. [Sig. bushy.] 

 dumosum var. rarispinum, Hall,1862, 15th 



Reg. Rep., Up. Held. Gr. [Sig. few 



spined.] 

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



Ham. Gr. [Sig. set with spines.] 

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



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



