428 



GASTEROPODA. 



[tra.— tro. 



compactus, Whiteaves, 1884, Pal. Foss. 

 vol. 3, p. 16, Guelph Gr. 



Fig. 717.— Subuliles oaiciierus. 



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 (ir. 

 gracilis, S. A. Miller, 1882, 



Jour. Cin. Soc. Nat. Hist., 



vol. 5, p. 116, Niagara (ir. 

 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. Foss. 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. 



Foss., 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. 



Fig. 718.-8nb- 

 ulites elon- 

 gatus. 



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

 agara and Guelph Gr. 

 Trachydomia, 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 hollidavi,) 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 (ice. Sur. III., vol. '_'. 

 p. 366, Low. Coal Meas. 



noduloeum, Worthen, 1884, Bull. No. -', 

 111. St. Mus. Nat. Hist.. \<. s, and 

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

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

 St. Mus. Nat. Hist., p. 347. [Ety. trt '»«, 

 hole; notos, back.] Distinguished from 

 Bucania by a single r<>w of hollow 

 •pines upon the back of the last whorl. 

 In casts the spines are usually broken 

 off, and hence Carpenter argaei they 

 never had spines. Type T. ohicago- 

 ensis. 



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

 Mas. Nat. Hist. Syn. for T. ehieago- 

 ensis. 



chicagoensis, McChesnev, 1860, (Bucania 

 chicagoensis,) New Pal. Foss., p. 61 

 agara Gr. 



trigonostoma, Hall & Whitfield, 1875, 

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

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

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

 Palaeozoic genus. 



antiqua, see Pseudophorus antiquus. 



carbonaria, Meek, 1866, Proc lead. Nat. 

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

 ognized. 

 Trochonkma, Salter, 1859, Can. Org. Rem., 

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

 nema, 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. 

 <.co. Sin. Wle., p. 74, and Geo. Wis., 

 vol. 4, p. 212, Trenton Or. 



beachi Whitfield, 1878, Ann. Rep. Geo. 

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

 p. 213, Trenton Gr. 



emaceratum, Hall Ac Whitfield, 1872,24th 

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

 Ham. (ir. 



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

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



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

 Nat. Hist., p. 394, Niagara (ir. 



halii, Hall, 1861, (Pleurotomaria halei,) 

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



inornatum, Whiteaves, 1884, Pal. Foss., 

 vol. 3, p. 19, Guelph (ir. 



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. 



