183 



Cyrt. 



Cyrtolites {Cryptonella) pileolus Hall, 15tli An. Kt. 1862, 



plate 6, fig. 10, 11 ; Pal. N. Y. 

 ^^ Vol. 5, part 2, plate 25, figs. 21, 

 'l^-^- 22. Hamilton, — In Pennsylvania 

 p\ it was recognized by Claypole in 

 Perry county (report F2, on Perry 

 county, preface, p. 14) m Hamil- 

 ton strata. VIII c, 



Cyrtolites sinuosus. See Appendix. — Vh, 

 Cyrtolites subcarinatus. (Not recognized by S. A. Mel- 



ler as an American species) Emmons' 

 Amer. Geol. Vol. 1, part 2, 1855, page 

 167, plate 6, figs. 25, 26 ; ''Somewhat 

 patelliform ; compressed, or sub-an- 

 ^ gular toward the base ; apex incurved ; 

 Em A.G.i855^ Fib hjoui-j^ widely expanded."— 77^. 



Cyrtolites trentouensis. (Conrad, Journal Acad. Nat. Sci. 

 Phila. Vol. 8, 1842, Trenton.) Emmons' Amer. 

 Geol. I, ii, page 167, plate 5, fig. 22 ; curvature 

 somewhat variable, from a short curve to nearly 

 a circle, as in fig. 38, for which see Appendix. 

 Section across the shell triangular; shell quite 

 thick. — Collected in Pennsylvania by C. E. Hall, (Ms. Rt. Dec. 

 30, 1876).— 77(?. 



Cystidea ; free crinoids, without stems and arms, and like 

 sea urchins now living ; found in the sebond 200' of Randall's 

 section at Warren, Pa., under the First Mountain Sand of the 

 Venango Oil region, i. e., in Pocono (Waverly, sub-carbonifer- 

 ous) strata. (CarlPs Rt. I, p. 53.) — X. 



Cystiphyllum americannum. Hall, Geology of the 



V(/l c .sHiite.. Fourth or Western Dis- 



V rri ' .«^ tj.i(,^ Qf ^^^ York, 1843. 



page 209, fig. 87, 2, 

 Hamilton formation. 

 (Edwards and Haine, 

 Monogr. Pal. Foss. 1851. 

 Not Lonsdale's Cysti- 

 phyllum cylindricum of 

 England.)— F77/'(?. 



rm.A.GlF55 



Hall -SI. 1 



