ICHTHYODORULITES. 



143 



Fig. 87. — Cylindracanthus ornatus Leidy. 1-6, New Jersey ; 7-10, Mon- 

 mouth Co. 



Fig. 88. — Cylindracanthus acus Cope. (Type, from Hussakof.) 



Genus SPHAGEPCEA Cope. 



Sphagepcea Cope, Proc. Amer. Philos. Soc. Phila., XI, 1869, p. 241. Type 

 SpJwgepcea aciculata Cope, virtually designated, monotypic. 



Spine slender, acute, nearly straight, with thin projecting an- 

 terior edge deeply notched from tip to short distance above base, 

 producing an acute dentition. No teeth behind, but two promin- 

 ent ridges separated by a deep groove. Sides of spine longitudi- 

 nally grooved. The single extinct species known. 



