428 



GASTEROPODA. 



[TRA. TRO. 



compactus, Whiteaves, 1884, Pal. FOBS. 

 vol. 3, p. 16, Guelph Gr. 



FIG. 717. Subulites caiciferus. 



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

 p. 223, Quebec Gr. 



elongatus, Emmons, 1842, 



Geo. Rep. N. Y., p. 392, 



and Pal. N. Y., vol. 1, p. 



182, Trenton Gr. 

 gracilis, S. A. Miller, 1882, 



Jour. Gin. Soc. Nat. Hist, 



vol. 5, p. 116, Niagara Gr. 

 inflatus, Meek & Worthen, 



1870, Proc. Acad. Nat. Sci. 



Phil., p. 47, and Geo. Sur. 



111., vol. 6, p. 495, Galena 



Gr. 

 notatus, Billings, 1866, Catal. 



Sil. FOBS. Antic., p. 54, An- 



ticosti Gr. 

 obesus, Whitfield, 1886, Bull. 



Am. Mus. Nat. Hist., vol. 



1, p. 318, Birdseye Gr. 

 parvulus, Billings, 1862, Pal. 



Foss., vol. 1, p. 36, Black 



Riv. Gr. 

 psyche, Billings, 1865, Pal. 



FOBS., vol. 1, p. 188, Quebec 



Gr. 

 richardsoni, Billings, 1857, 



Rep. of Progr., Geo. Sur. 



Can., p. 306, Hud. Riv. Gr. 

 terebriformis, Hall & Whit- 

 field, 1875, Ohio Pal., vol. 



2, p. 141, Niagara Gr. 

 ventricosus, Hall, 1852, Pal. 



N. Y., vol. 2, p. 347, Ni- 

 ,tus. ~" agara and Guelph Gr. 



TRACHVDOMIA, Meek & Wor- 

 then, 1866, Geo. Sur. 111., vol. 2, p. 364. 

 [Ety. trachys, rough ; doma, house.] In 



form like Naticopsis, but distinguished 

 by having the surface ornamented with 

 regularly disposed nodes. Type T. 

 nodosum. 



hollidayi, Meek & Worthen, 1860, (Nati- 

 copsis hollidayi,) Proc. Acad. Nat. Sci. 

 Phil., p. 463, and Geo. Sur. 111., vol. 2, 

 p. 367, Low. Coal Meas. 



nodosum, Meek & Worthen, 1860, (Nati- 

 copsis nodosa,) Proc. Acad. Nat. Sci. 

 Phil., p. 463, and Geo. Sur. 111., vol. 2, 

 p. 366, Low. Coal Meas. 



nodulosum, Worthen, 1884, Bull. No. 2, 

 111. St. Mus. Nat. Hist., p. 8, and Geo. 

 Sur. 111., vol. 8, p 146., Coal Meas. 

 TBEMANOTUS, Hall, 1868, 20th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 347. [Ety. trema, 

 hole ; notos, back.] Distinguished from 

 Bucania by a single row of hollow 

 spines upon the back of the last whorl. 

 In casts the spines are usually broken 

 off, and hence Carpenter arg'ues they 

 never had spines. Type T. chicago- 

 ensis. 



alphcut, Hall, 1864, 10th Rep. N. Y. St. 

 Mus. Nat. Hist. Syn. for T. chicago- 

 ensis. 



chicagoensis, McChesney, 1860, (Bucania 

 chicagoensis,) New Pal. Foss., p. 69, Ni- 

 agara Gr. 



trigonostoma, Hall & Whitfield, 1875, 



Ohio Pal., vol. 2, p. 146, Niagara Gr. 

 Trochita, Schumacher, 1817, Ess-ai N. Syst., 

 p. 184. [Ety. trochus, wheel.] Not a 

 Palaeozoic genus. 



antiqua, see Pseudophorus antiquus. 



carbonaria, Meek, 1866, Proc. Acad. Nat. 

 Sci., p. 270, Kaskaskia Gr. Not rec- 

 ognized. 



TROCHONEMA, Salter, 1859, Can. Org. Rem., 

 Decade 1, p. 27. [Ety. trochus, a wheel ; 

 nemo,, a thread.] Turbinate, thin, of 

 few angular whorls; strong concen- 

 tric ridges, crossed by oblique lines of 

 growth; umbilicus wide, open; inner 

 lip thin, scarcely reflected ; peritreme 

 complete. Type T. umbilicatum. 



beloitense, Whitfield, 1878, Ann. Rep. 

 Geo. Sur. Wis., p. 74, and Geo. Wis., 

 vol. 4, p. 212, Trenton Gr. 



beachi Whitfield, 1878, Ann. Rep. Geo. 

 Sur. Wis., p. -74, and Geo. Wis., vol. 4, 

 p. 213, Trenton Gr. 



emaceratum, Hall & Whitfield, 1872, 24th 

 Rep. N. Y. Mus. Nat. Hist., p. 193 r 

 Ham. Gr. 



exile, Whitfield, 1889, Bull. Am. Mus. 

 Nat. Hist., vol. 2, p. 57, Calciferous Gr. 



fatua, Hall. 1867, 20th Rep, N. Y. Mus. 

 Nat. Hist., p. 394, Niagara Gr. 



halii, Hall, 1861, (Pleurotomaria halei,) 

 Geo. Sur. Wis., p. 34, Niagara Gr. 



inornatum, Whiteaves, 1884, Pal. Foss., 

 vol. 3, p. 19, Guelph Gr. 



meekanum, n. sp. Up. Held. Gr. at 

 Marblehead, Ohio. Proposed instead 

 of T. tricarinatum, Meek, 1871, Proc. 

 Acad. Nat. Sci., p. 82, and Ohio Pal., 

 vol. 1, p. 218, which was preoccupied. 



