420 



GASTEROPODA. 



[PI.E. 



chesterensis, Meek & Worthen, 1860, 

 Proc. Acad. Nat. Sci., p. 460. and 

 Geo. Sur. 111., vol. 2, p. 303, Kaskas- 

 kia Gr. 



chesterentiis, Swallow, 1863, Trans. St. Louis 

 Acad. Sci. The name was preoccupied, 

 but it is probably a synonym. 



circe, Billings, 1857, Rep. of Progr. Geo. 

 Sur. Can., p. 303, Hud. Riv. Gr. 



clipeiformis, Spencer, 1884, Bull. No. 1, 

 Mus. Univ. St. Mo., p. 57, Niagara Gr. 



concava, see Eotrochus concavus. 



coniformis, Worthen, 1882, Bull. No. 1, 

 111. St. Mus. Nat. Hist., p. 38, Coal 

 Meas. Proposed instead of P. conoides, 

 M. & W. 



conoides, Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci., p. 271. Preoccupied 

 by Deshayes in 1831. See P. coni- 

 formis. 



conulus, Hall, 1858, Trans. Alb. Inst., vol. 

 4, p. 26, and Bull. Am. Mus. Nat. Hist., 

 p. 84, Warsaw Gr. 



cooperensis, n. s. Kaskaskia Gr. Pro- 

 posed instead of P. trochiformis, Swal- 

 low, Trans. St. Louis Acad. Sci., vol. 2, 

 p. 99, that was preoccupied. 



coronula, Hall, syn. for P. sphserulata. 



coxana, Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci., p. 272, and Geo. Sur. 

 111., vol. 5, p. 600, Coal Meas. 



coxana, Worthen, 1884. The name was 

 preoccupied. See P. iowensis. 



crevieri, Billings, 1859, Can. Nat. and 

 Geol., vol. 4, p. 456, Chazy Gr. 



cryptata, Billings, 1866, Catal. Sil. Foss. 

 Antic., p. 54, Anticosti Gr. 



cyclonemoides, Meek & Worthen, 1868, 

 Geo. Sur. 111., vol. 3, p. 360, Niag- 

 ara Gr. 



cyclostoma, Whiteaves, 1884, Pal. Foss., 

 vol. 3, p. 23, Guelph Gr. 



deiopea, Billings, 1862, Pal. Foss., vol. 1, 



p. 155, Guelph Gr. 

 delia, -" 



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

 p. 61, Gaspe limestone No. 8, De- 

 vonian. 



delicatula, Hall, 1876, Illust. Devonian 

 Foss, pi. 19, and Pal. N. Y., vol. 5, pt. 2, 

 p. 70, Up. Held. Gr. 



delphinuloides, Goldfuss, as identified by 

 d'Archiac & Verneuil. Not American. 



depauperata, Hall, 1862, Geo. Rep. Wis., 

 p. 55, Hud. Riv. Gr. 



depressa, Cox, 1857, Geo. Sur. Ky., vol. 3, 

 Coal Meas. The name, was preoccu- 

 pied by Passy in 1832, by Phillips in 

 1836, and by DeKoninck in 1841. See 

 P. kentuckiensis. 



disjuncta, Hall, 1876, Illust. Devonian 

 Foss. pi. 20, and Pal. N. Y., vol. 5, pt. 

 2, p. 84, Ham. Gr. 



dispersa, Dawson, 1868, Acad. Geol., p. 

 310, Carboniferous. 



docens, Billings, 1859, Can. Nat. and Geol., 

 vol. 4, p. 452, Chazy Gr. 



doris, see Cyclonema doris. 



dryope, Billings, 1865, Pal. Foss., vol. 1, 

 p. 170, Black Riv. Gr. 



durhamensis, Whiteaves, 1884, Pal. Foss., 



vol. 3, p. 24, Guelph Gr. 

 elegantula, Hall, 1858, (Murchisonia ele- 



gantula,) Trans. Alb. Inst., vol. 4, p. 27, 



and Bull. Am. Mus. Nat. Hist., p. 84, 



Warsaw Gr. 

 ella, Hall, 1876, Illust. Devonian Foss., pi. 



19, and Pal. N. Y., vol. 5, pt. 2, p. 72, 



Ham. Gr. 

 elora, Billings, 1862, Pal. Foss., vol. 1, p. 



154, Guelph Gr. 

 emmetensis, Winchell, 1866, Rep. Low. 



Penin. Mich., p. 96, Ham. Gr. 

 estella, Hall & Whitfield, 1872, 24th Rep. 



N. Y. Mus. Nat. Hist., p. 195, Ham. Gr. 

 etna, Billings, 1865, Pal. Foss., vol. 1, p. 



226, Quebec Gr. 

 eugenia, Billings, 1862, Pal. Foss., vol. 1, 



p. 30, Black Riv. Gr. 

 euomphaloides, Hall, 1862, 15th Rep. 



N. Y. Mus. Nat. Hist., p. 18, Ham. Gr. 

 exigua, Winchell, 1862, Proc. Acad. Nat. 



Sci., p. 424, Marshall Gr. 

 filitexta, Hall, 1876, Illust. Devonian 



Foss., pi. 19, and Pal. N. Y., vol. 5, pt. 



2, p. 73, Ham. Gr. 

 galtensis, Billings, 1862, Pal. Foss.. vol. 1, 



p. 154, Guelph Gr. 

 giffordi, Worthen, 1884, Bull. No. 2, 111. 



St. Mus. Nat. Hist., p. 5, and Geo. Sur. 



111., vol. 8, p. 135, Coal Meas. 

 glandula, Shumard, 1860, Trans. St. Louis 



Acad. Sci., vol. 1, p. 626, Coal Meas. 

 gonopleura, Winchell & Marcy, 1865, Bost. 



Soc. Nat. Hist., p. 98, Niagara Gr. 

 granulostriata, Meek & Worthen, 1860, 



Proc. Acad. Nat. Sci., p. 459, and Geo. 



Sur. 111., vol. 2, p. 356, Low. Coal Meas. 

 grayvillensis, Norwootl & Pratten, 1854, 



Jour. Acad. Nat. Sci., 2d series, vol. 3, 



p. 75, Coal Meas. 

 gregaria, Billings, 1859, Can. Nat. and Geo., 



vol. 4, p. 355, Calciferous Gr. 

 gurleyi, Meek, 1871, Proc. Acad. Nat. Sci., 



p. 177, Coal Meas. 

 halii, see Trochonema halii. 

 hallana, Shumard, 1859, Trans. St. Louis 



Acad. Sci., vol. 1, p. 399, Permian Gr. 

 halii, see Raphistoma halii. 

 harpya, Billings, 1865, Pal. Foss., vol. 1, 



p. 227, Quebec Gr. 

 haydenana, Geinitz, 1866, Carb. und Dyas 



in Neb., p. 11, and Pal. E. Neb., p. 231, 



Coal Meas. 

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



Nat. Hist., p. 105, and Pal. N. Y., vol. 



5, pt. 2, p. 68, Up. Held. Gr. 

 helena. Billings, 1860, Can. Nat. and Geo., 



vol. 5, p. 165, Hud. Riv. Gr. 

 hickmanensis, Winchell, 1869, Geo. of 



Tenn. and Proc. Am. Phil. Soc. vol., 12, 



p. 257, Waverly Gr. 

 hortensia, Billings, 1865, Pal. Foss., vol. 



1, p. 227, Quebec Gr. 

 hoyi, Hall, 1861, Rep. of Progr. Wis. Sur., 



p. 35, Niagara Gr. 

 humerosa, Meek & Hay den, 1858, Proc. 



Acad. Nat. Sci. Phil., p. 262, and Pal. 



Up. Mo., p. 46, Coal Meas. 



