Oryp. 



1(34 



Cryptonella {Terebratula) eudora. See Appendix. 



Cryptonella planirostra. ( Terebratula planirostra. See 

 Appendix for Hgure and description, 



Cryptonella rectirostra. ( Terehrutula reetirostra. ) Hall, 



1860, ISth An. Rt. ; Pal. N. Y. Vol. 4,p, 

 394", plate 61, fi^s. 3, 4, 5. Hamilton 

 group. Collected by Claypole (F2,xiii) 

 at Barnett's mill, Perry Co., from Hamil- 

 51. ton upper slates^ see Catalogue of Collec- 

 tions, 000, Spec. 5-152.— F///0. 



Cryptonella ? in CarlPs collection of 1875; C.E. Hall, 



Ms. Et. Dec. 30, 1876. Oil Region, Northwest Pennsylvania, 

 Upper Chemung rocks. — YIII-IX, 



Cryptopora rniraUlis. See Fenestella moulds. 

 Ctenoptychius cristatus, Dawson. Acadian Geology, 

 ■«XIH. /i^^AA.A f^^2 1868, p. 209, fig. 52,- comb- 

 CTv .. f\ m\i m I AAaA like " tooth of a fish of the 



Coal Measures; very small; 

 %. magnified to show its 

 14 points, much com- 

 pressed, on a narrow base. 

 —2 III. 



See Appendix with fgure. 

 See Appendix with figure. 

 Ctenacanthus triangularis. See Appendix with figure. 

 Ctenacanthus vetustus. See Appendix with figure. 

 Ctenacanthus. Several species of these fish occur in Div. 

 A, B,C,D,E, ofRandalPs section at Warren. (Rt. IIII,p.318.) 

 Fish spines were found by White, in Meadville upper lime- 

 stone (Q4, 83.) — A fine fish spine, found by White, in the 

 Sharpsville upper sandstone (between the Meadville upper and 

 lower limestones), Crawford Co. (Q4, p. 86.) — X 



A Ctenacanthus spine, partly magnified., from Dawson's 



Acadian Geology is given in the 

 figure under Acrolepis horto- 

 jr.7^, nensis, in the Appendix. Fig. 

 78 </, spine of Ctenacanthus.^ hj 

 portion of spine magnified. 



Ctenacanthus formosus. 

 Ctenacanthus marshii. 



Ctenacanthus 



