CREPIDULA. Panama Shells. 227 



Calyptrcea (Crepidula) excavata Miill. Synop. Nov. Test. 



Viv. p. 150. May 1836. 



Crepidula Lam. An. sans Vert. VII. 



649. No. 19. (Desh. ed.) 1838. 

 Lam. An. sans. Vert. III. Pt. 1. 



p. 239. No. 19. (Desh. ed. tert.) 1841. 



Station . Unknown. 



Habitat. Eeal Llejos; Cuming! Broderip. 



Chili ; Deshayes. 



Panama ; C. B. A. ! 

 1 specimen was obtained. 



In the absence of testimony, the habitat mentioned by 

 Deshayes must be considered as doubtful. 



346. Crepidula hepatica 1 



Synonymy. 



Crepidula hepatica Desh. Encyc. Meth. Vers. II. 26. (2d ser. pag.) 1830. 



Lam. An. sans Vert. VII. 646. No. 12. 



(Desh. ed.) 1838. 



Lam. An. sans Vert. III. Pt. 1. p. 238. 



No. 12. (Desh. ed. tert.) 1841. 

 Menke in Zeitsch. Mai. p. 184. - Dec. 1847. 



Our specimens have an epidermis, which is more or less 

 lamellar or pilose. Deshayes describes the shell as having a 

 smooth exterior surface, but Menke says " confertim distinct^ 

 porcata." Our shells exhibit a variation in the character of the 

 surface, which reconciles this apparent discrepancy. A variety 

 is very convex. 



Station. Adhering to Strombus Peruvianus, q. v. ; also to 

 Purpura tecta, q. v. 



Another specimen is on a Conus gladiator, and is very 

 convex ; probably in consequence of the very convex surface to 

 which it adheres. Some specimens are longitudinally recurved 

 but laterally very convex ; conforming to the surface on which 

 they grew. 



