226 Panama Shells. CALYPTB^ID^. 



tlie middle, with a small sinus at the left, a broad one at the 

 middle of the edge, and none at the right side. 



Length .23 inch : breadth .14 inch ; convexity .07 inch. 



Station. — On Ceriikium irroratum, q. v, 



JBabitat.—T&hoga ; 0. B. A. ! 



This species was not observed until after the shells arrived 

 here. When cleaning a quantity of C. irroratum, 45 specimens 

 were obtained. 



344. Crepidula echinus. 



Synonymy. 



Calyptrma {Crepipatella) echinus Brod. in Proc. Zool. Soc. 



Lond. p. 39. - - May 1834. 



Brod. in Trans. Zool. Soc. 



Lond. I. 203. pi. 27. f. 1. 1835. 



Miill. Synop. Nov. Test. 



Viv. p. 148. - - May 1836. 

 Crepidula Lam. An. sans Vert. VII. 



, 650. No. 23. (Desh. ed.) 1838. 



— — — — Lam. An. sans Vert. HI. 



Pt. 1. p. 239, No. 23. 



(Desh. ed. tert.) - - 1841. 



Station. — Under stones at low water. 



Habitat. — Lobos I. ; Cuming 1 Broderip : also Miiller. 



Peru ; Deshayes : also Jay. 



Panama ; 0. B. A I 

 18 specimens were obtained. 



846. Crepidula cxearata. 



Synonymy. 



Calyptrcea (Crepidula) excavata Brod. in Proc. Zool. Soc. 



Lond. p. 40. - - May 1834. 

 " Brod. in Tians. Zool. Soc. 



Lond. L 205. pi. 29. f. 1. 1835. 



