416 



GASTEROPODA. 



[PI.A. 



cyrtolites, McChesney, 1859, Pal. Foss.,p. 



71, Coal Meas. 

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



Mus. Nat. Hist., p. 29, and Pal. N. Y., 



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

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



p. 322, Low. Held. Gr. 

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



p. 205, and Pal. N. Y., vol. 5, pt, 2, p. 



14, Up. Held. Gr. 



Fig. 094.— Platyceras dumosum. 



dumosum var. attenuatum, Meek, 1871, 

 Proc. Acad. Nat. Sci., p. 75, and Ohio 

 Pal., vol. 1, p. 212, Up. Held. Gr. 



dumosum var. rarispinum. Hall, 1862, 

 15th Rep. N.Y. Mus. Nat. Hist., p. 38, and 

 Pal. N. Y., vol. 5, pt. 2, p. Hi, Up. 

 Held. Gr. 



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

 Mus. Nat. Hist, p. 38, and Pal. N. Y., 

 vol. 5, pt. 2, p. 13, Ham. Gr. 



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

 p. 335, Low. Held. (ir. 



equilaterale, Hall, 1860, Bupp. to vol. 1, 

 pt. 2, Iowa Rep., p. 89, and Geo. Sur. 

 111., vol. 5, p. 518, Keokuk (ir. 



erectum, Hall, 1843, (Acroculia erecta,) 

 Geo. 4th Dist. N. Y., p. 174, and I'al. 

 N. Y., vol. 5, pt. 2, p. 5, Cornif. & 

 Ham. Grs. • 



expansum, see Strophostylus expansus. 



fissurellum, Hall, 1860, Supp. to Geo. Rep. 

 Iowa, vol. 1, pt. 2, p. 90, and Geo. Sur. 

 111., vol. 5, p. 519, Keokuk Gr. 



fluctuosum, Ulrich, 1886, Cont. to Am. 

 Pal., p. 31, Up. Held. Gr. 



formosum, Keyes, 1888, Proc. Am. 1'hil. 

 Soc, (author's copy, p. 14,) Kinder- 

 hook Gr. 



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

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

 vol. 5, pt. 2, p. 11, Up. Held. Gr. 



fornicatum var. contractum, Hall, 1876, 

 Illust. Devonian Foss., pi. 5, Up. 

 Held. Gr. 



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

 p. 206, and Pal. N. Y., vol. 3, p. 312, 

 Low. Held, and Oriskany Grs. 



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

 p. 322, Low. Held. Gr. 



haliotoides, Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci. Phil., p. 264, and Geo. 

 Sur. 111., vol. 3, p. 458, Kinder- 

 hook Gr. 



herzeri, Winchell, 1870, Proc. Am. Phil. 

 Soc, p. 256, Marshall Gr. 



incile, Hall, 1859, Pal. N. Y., vol. 3, p. 388, 



Low. Held. Gr. 

 infuudibulum, Meek & Worthen, 1866, 



Proc. Acad. Nat. Sci. Phil., p. 266, and 



Geo. Sur. 111., vol. 5, p. 517, Keo- 

 kuk Gr. 

 intermedium, Hall, 1* v., |\,|. N. Y., vol. 



3, p. 321, Low. Held. ( I r. 

 laciniosum, Ringueberg, 1886, Ball. Bat 



Soc. Nat. Sci., vol. 5, p. 11, Ni;e_ r - 



ara Gr. 

 lfevigatum, Meek & Worthtii, 1866, Proc. 



Acad. Nat. Sci., j>. 268, kaskask .. 

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



p. 330, Low. Held. < i r. 

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



(author's copy, p. 14,) Burlington (ir. 

 lodiense, Meek, 1871, Proc. Acad. Nat. 



Sri. Phil., p. 170, and Ohio Pal., vol. 2, 



p. 313, Waverlv I i r. 

 magnificum, Hall, 18".:'. Pal. N. Y., vol. 3, 



p. 476, Oriskany sandstone. 

 membranaceum, Ringueberg, 1888, Hull. 



Buf. Soc Nat- Sci., vol. ■">, p. I">, Niag- 

 ara « i r. 

 minutissimum, Walcott, 1879, Desc. New 



Spec. Foss., p. 1, Calciferoue 

 multisimiatiim, Hall, 1859, I'al. N. Y. 



vol. 3, p. 319, Low. Held. Gr. 

 niultispiimsuin, Meek, 1871, PrOC. \<a<l. 



Nat. Sci. I'hil., p. T."., and Ohio I'al., 



vol. 1, p. 210, Cornif. I 

 naticoides, Ktheridge, 187s, Qoar. .lour. 



Geo. Soc, v.. I. 84, p. 603, Up. 8iL 

 nehrasken.se, Meek, 1872, I'al. E. Neb., p. 



227, Coal Meas. 

 newberrvi, Hall, I860, I'al. N. V., vol. 3, 



p. 333, Low. Held. Gr. 

 niagarense, Hall, L852, (Acroculia Diajr- 



annsis.) Pal. N. Y., vol. 2, p. 288, Ni- 

 agara Gr. 

 nodosum, Conrad, 1M1. Ann. Kep. Y Y.. 



p. 56, and I'al. N. Y., vol. 8, p. 478, 



Oriskanv sandstone. 

 obeflom, Hall, 1859, Pal. N. Y., vol. 8, p. 



329, Low. Held. Gr. 

 obliquum, Keyes, 1888, Proc. Am. Phil. 



Soc, (author's copy, p. 13,) Burling- 

 ton Gr. 

 occldena, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 254, Subcarbon- 



iferous. 

 ovale, Stevens, 1858, (Acroculia ovalis,) 



Am. Jour. Sci., vol. 25, p. 261, Subcar- 



boniferous. 

 pabulocrinus, Owen, 1862, (Pileopsis pa- 



bulocrinus,) (ieo. Sur, Indiana, p. 364, 



Keokuk < ir. 

 paralium, White & Whitfield, 1862, Proc. 



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



Kinderhook Gr. 

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



477, Oriskany sandstone, 

 pentalobus, Hall, 1859, Pal. N. Y.' vol. 3, 



p. 319, Low. Held. (ir. 

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



328, Low. Held. Gr. 

 perplexum, Hall, 1876, Illust. Devonian 



Foss., pi. 2, Up. Held. Gr. 



