GASTEROPODA. 



415 



FIG. 693. Phragnio- 

 stoma cymbula. View 

 of aperture; L, lam- 

 ina ; 8, septum. 



convex; aperture transverse. Type P. 

 kearneyi. 



kearneyi, Hall, 1862, (Pleurotomaria 

 kearneyi,) 14th Rep. N. Y. Mus. Nat. 

 Hist., p. 105, Up. Held. Gr. 

 precursor, Clarke, 1885, Bull. U. S. Geo. 



Sur. No. 16, p. 55, Portage Gr. 

 Patella, Linnaeus, 1758, Syst. Nat. 10th Ed. 

 [Ety. patella, dish.] Not a Palsezoic 

 genus. 



levettei, see Lepetopsis levetti. 

 Phanerotinus, Sowerby, 1844, Min. Conch., 

 vol. 7, p. 29. [Ety. phaneros, aperture ; 

 teino, extended. Syn. for Eccyliom- 

 phalus. 



paradoxus, see Eccyliomphalus paradoxus. 

 Phragmolites, syn. for Cyrtolites. 

 compressus, see Cyrtolites compressus. 



PHRAGMOSTOMA, Hall, 

 1861, 14th Rep. 

 N. Y. Mus. Nat. 

 Hist., p. 94. [Ety. 

 phragmos, a par- 

 tition ; stoma, the 

 mouth ; from the 

 septum within 

 the aperture, 

 which distin- 

 guishes this ge- 

 nus from Cari- 

 naropsis and Bel- 

 lerophon.] Type 

 P. cymbula. 

 cunute, Hall, 1861, 14th Rep. N. Y. Mus. 



Nat. Hist, p. 94, Hud. Riv. Gr. 

 cymbula, Hall, 1861, 14th Rep. N. Y. Mus. 



Nat. Hist., p. 94, Hud. Riv. Gr. 

 natator, see Bellerophon natator. 

 Physa, Dapernaud, 1801, Hist. Nat. d. 



Moll. Not a Palaeozoic genus. 

 prisca, Walcott, 1885, Monogr. U. S. Geo. 



Sur., vol. 8, p. 262, Subcarboniferous. 

 Pileopsis conoides, P. naticoides, P. rotundata, 

 and P. spiralis, Castelnau, 1843, Syst. 

 Sil. Not recognized. 

 tubifer, syn. for Platyceras dumosum. 

 vetustus, Sowerby. Not American. 

 Pkinorbis, Guettard, 1756, Mem. Acad. Sci. 



Paris. Not a Palaeozoic genus. 

 trilobatus, see Bucania trilobata. 

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

 p. 205. [Ety. platys, broad ; keras, horn.] 

 Depressed subglobose, subovoid, or 

 obliquely subconical ; spire small ; vo- 

 lutions none, or very few, without 

 columella; aperture more or less ex- 

 panded, often campanulate, and some- 

 times with lip reflexed; peristome en- 

 tire or sinuous ; surface striated, cancel- 

 lated, lamellose, or spiniferous. Type 

 P. dumosum. 



acutirostre, Hall, 1858, (Capulus acuti- 



rostris,) Trans. Alb. Inst., vol. 4, p. 31, 



and Geo. Sur. Iowa, p. 665, Warsaw Gr. 



agreste, Hall, 1859, Pal. N. Y., vol. 3, p. 338, 



Low. Held. Gr. 



ammon, Hall, 1862, 15th Rep. N. Y. Mus. 

 Nat. Hist., p. 37, and Pal. N. Y., vol. 5, 

 pt. 2, p. 20, Up. Held. Gr. 



angulatum, Hall, 1852, (Acroculia angu- 

 lata.) Pal. N. Y., vol. 2, p. 289, Clinton 

 and Niagara Grs. 



arctistoma, Ulrich, 1886, Cont. to Am. 

 Pal., p. 30, Up. Held. Gr. 



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



336, Low. Held. Gr. 



argo, Hall, 1862, 15th Rep. N. Y. Mus. 



Nat. Hist., p. 39, and Pal. N. Y., vol. 5, 



pt. 2, p. 19, Up. Held. Gr. 

 attenuatum, Hall, 1862, 15th Rep. N. Y. 



Mus. Nat, Hist., p. 30, and Pal. N. Y., 



vol. 5, pt. 2, p. 6, Ham. Gr. 

 attenualum, see P. dumosum var. atten- 

 uatum. 

 auriculatum, Hall, 1876, Illust. Devonian 



Foss., pi. 3, Ham. Gr. 

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



315, Low. Held. Gr. 

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



vol. 1. pt. 2, p. 90, Burlington Gr. 

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



p. 318, Low. Held. Gr. 

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



p. 327, Low. Held. Gr. 

 bivolve, White & Whitfield, 1862, Proc. 



Bost. Soc. Nat. Hist., vol. 8, p. 302, Kin- 



derhook Gr. 

 bucculentum. Hall, 1862, 15th Rep. N. Y. 



Mus. Nat. Hist., p. 33, and Pal. N. Y., 



vol. 5, pt. 2, p. 10, Ham. Gr. 

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



328, Low Held. Gr. 

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



478, Oriskany sandstone, 

 campanulatum, Winchell & Marcy, 1865, 



Mem. Bost. Soc. Nat. Hist., p. 99, Ni- 

 agara Gr. 

 capax, Keyes, 1888, Proc. Am. Phil. Soc., 



(author's copy, p. 13,) Burlington Gr. 

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



91, Burlington Gr. 

 carinatum, Hall, 1862, 15th Rep. N. Y 



Mus. Nat. Hist., p. 33, and Pal. N. Y. 



vol. 5, pt. 2, p. 5, Up. Held. Gr. 

 chesterense, Meek &Worthen, 1866, Proc. 



Acad. Nat. Sci., p. 265, Kaskaskia Gr. 

 cirriforme, Conrad, 1841, Ann. Rep. N. Y. 



Not clearly denned, 

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



337, Low. Held. Gr. 



concavum, Hall, 1862, 15th Rep. N. Y. 



Mus. Nat. Hist., p. 30, and Pal. N. Y., 



vol. 5, pt. 2, p. 3, Up. Held. Gr. 

 conicum, Hall, 1862, 15th Rep. N. Y. Mus. 



Nat. Hist., p. 31, and Pal. N. Y., vol. 5, 



pt. 2, p. 3, Ham. Gr. 

 conradi, Walcott, 1885, Monogr. U. S. Geo. 



Sur., vol. 8, p. 182, Devonian, 

 cornuforme, Winchell, 1863, Proc. Acad. 



Nat. Sci., p. 18, Marshall Gr. 

 crassum, Hall, 1862, 15th Rep. N. Y. Mus. 



Nat. Hist., p. 36, and Pal. N. Y., vol. 5, 



pt. 2, p. 18, Up. Held. Gr. 

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



3, p. 338, Low. Held. Gr. - 

 cymbium, Hall, 1862, 15th Rep. N. Y. 



Mus. Nat. Hist., p. 35, and Pal. N. Y., 



vol. 5, pt, 2, p. 12, Up. Held Gr. 



