452 PROCEEDINGS OF THE NATIONAL ill'SEUM. vor-. 53 



Posterior and postero-lateral margins granulate; it is impossible 

 to tell if there is a postero-lateral tooth or spine. 



Of the species now inhabiting the Cahfoniia coast, this species re- 

 sembles most C. antennarius Stimpson.^ This last has also an uneven 

 surface, with longitudinal furrows and thickened teeth alternating 

 along the anterior margin; its granulation is much more even than 

 in the fossil form, and the antero-lateral teeth longer and more 

 curved. 



» Proc. California Acad. Sci., vol. 1, 1856 ,p. 88. 



