CYC.] 



GASTEROPODA. 



401 



doris, Hall, 1862, (Pleurotomaria doris,) 

 15th Rep. N. Y. M us. Nat. Hist., p. 43, 

 and Pal. N. Y., vol. 5, pt. 2. p. 34, 

 Up. Held. Gr. 



elevatum, Hall, 1868, 20th Rep. N. Y. Mus. 

 Nat. Hist., p. 391, Niagara Gr. 



FIG. 664. Cyclonema hageri. 



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



29, Trenton Gr. 

 hallanum, Salter, 1859, Can. Org. Rem., 



Decade 1, p. 26, Black Riv. Gr. 

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

 Mus. Nat. Hist., p. 47, and Pal. N. Y., 

 vol. 5, pt. 2, p. 37, Ham. Gr. 

 humile, Billings, 1866, Catal. Sil. Foss. 

 Antic., p. 56, Anticosti Gr. 



leavenworthanum, Hall, 

 1858, (Pleurotomaria 

 lea venworthana,) 

 Trans. Alb. Inst,, vol. 

 4, p. 24, and Bull. Am. 

 Mus. Nat. Hist., p. 75, 

 Warsaw Gr. 



liratum, Hall, 1862, 15th 

 Rep. N. Y. Mus. Nat. 

 Hist., p. 47, and Pal. 

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



FIG. 665. Cyclo- 

 iiema halla- 

 num. 



35, Ham. Gr. 



mediocre, Billings, 1866, 

 Catal. Sil. Foss. Antic., p. 56, Anticosti Gr. 



montrealense, Billings, 1862, Pal. Foss., 

 vol. 1, p. 30, Trenton Gr. 



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

 Mus. Nat. Hist., p. 48, and Pal. N. Y., 

 vol. 5, pt. 2, p. 36, Ham. Gr. 



obsolescens, Hall, 1877, 1st Ed. Am. Pal. 

 Foss., p. 243, and Pal. N. Y., vol. 5, pt. 

 2, p. 38, Chemung Gr. Proposed in- 

 stead of C. obsoleta, Hall, 1876, which 

 was preoccupied. 



obsoletum, Hall, 1852, Pal. N. Y., vol. 2, 

 p. 90, Clinton Gr. 



obsoleta, Hall. The name was preoc- 

 cupied. See C. obsolescens. 



percarinatum, Hall, 1847, (Pleurotomaria 

 percarinata,) Pal. N. Y., vol. 1, p. 177, 

 Trenton and Hud. Riv. Grs. 



percingulatum, Billings, 1857, Rep. of 

 Progr. Geo. Sur. Can., p. 304, Clinton 

 and Niagara Grs. 



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

 p. 188, Quebec Gr. 



pyramidatum, James, 1874, Cin. Quar. 



Jour. Sci., vol. 1, p. 152, Hud. Riv. Gr. 

 rugilineatum, Hall & Whitfield, 1872, 24th 



Rep. N. Y. Mus. Nat. Hist., p 186, 



Niagara Gr. 

 semicarinatum, Salter, 1859, Can. Org. 



Rem., Decade 1, p. 27, Black Riv. Gr. 

 subangulatum, Hall, 1858, (Pleurotomaria 



subangulata,) Trans. Alb. Inst., vol. 4, 



p. 25, and Bull. Am. Mus. Nat. Hist, 



p. 76, Warsaw Gr. 

 sulcatum, Hall, 1852, Pal. N. Y., vol. 2, p. 



347, Guelph Gr. 

 tennesseense, Roemer, 1860, (Turbo ten- 



nesseensis,) Sil. Fauna, des West Tenn., 



p. 77, Niagara Gr. 

 thalia, Billings, 1857, (Pleurotomaria tha- 



lia,) Rep. of Progr. Geo. Sur. Can., p. 



303, Hud. Riv. Gr. 

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



Sur. Can., p. 305, Mid. Sil. 

 varicosum, Hall, 1870, 24th Rep. N. Y. 



Mus. Nat. Hist., pi. 8. (Published by 



mistake in 14th Rep. 1861, as C. ven- 



tricosa.) Trenton Gr. 

 ventricosum, Hall, 1852, Pal. N. Y., vol. 



2, p. 90, Clinton Gr. 

 CYCLOBA, Hall, 1845, Am. Jour. Sci., vol. 48, 



p. 294. [Ety. kuklos, circle.] Shells 



minute, suture deep, surface smooth, 



lip thin, aperture circular. Type C. 



minuta. 

 alta, Foerste, 1885, Bull. Sci. Lab. Deni- 



son Univ., p. 96, Niagara Gr. Does 



not belong to this genus, 

 depressa, Ulrich, 1879, Jour. Cin. Soc. Nat. 



Hist., vol. 2, p. 13, Hud. Riv. Gr. 

 hoffmanni, S. A. Miller, 1874, 



Cin. Quar. Jour. Sci., vol. 1, 



p. 313, Hud. Riv. Gr. 

 minuta, Hall, 1845, Am. Jour. 



Sci., vol. 48, p. 294, Utica 



Slate and Hud. Riv. Gr. 

 nana, syn. for Cyclora minuta. 

 parvula, Hall, 1845, (Turbo hoffman- 



parvula,) Am. Jour. Sch,vol. ni - 



48, p. 294, and Ohio Pal., vol. 1, p. 154, 



Hud. Riv. Gr. 

 pulcella, S. A. Miller, 1882, Jour. Cin. Soc. 



Nat. Hist., vol. 5, p. 231, Hud. Riv. Gr. 

 turbinata, Whiteaves, 1881, Can. Nat., 



vol. 10, p. 101, Devonian, 

 valvatiformis, Whiteaves, 1881, Can. Nat., 



vol. 10, p. 100, Devonian. 

 Oyclostoma, Lamarck, 1801, Syst. An. sans 



Vert. [Ety. kuklos, circle ; stoma, mouth.] 



Not a Palaeozoic genus. 

 pervetusta, see Pleurotomaria pervetusta. 

 CYRTOLITES, Conrad, 1838, 

 Ann. Rep. N. Y., p. 118. 

 [Ety. kurtos, curved ; 

 lithos, stone.] Shell 

 coiled in the same plane, 

 gradually tapering, volu- 

 tions one or more, angu- 

 lar or carinated on the 

 back and sides ; section 



subquadrate ; aperture not expanded ; 



surface ornamented. Type C. ornatus. 



FIG. 667. Cyr- 

 tolltes carina- 

 tus. 



