FissuKELLA. Panama Shells. 235 



Station. — ^Unknown. 



Sabitat — Panama ; 0. B. A. ! 



Only 1 Bpecimen of this extraordinary species was obtained. 



353. Crepidula rostrata. Nov. sp. 



Shell very convex, irregularly elliptic : livid brown, some- 

 times with pale ill-defined spots : irregularly somewhat corru- 

 gated both radiately and concentrically : apex very acute and 

 prominent, rostriform, very distant from but extending beyond 

 the posterior margin, slightly directed to the right : septum far 

 within the margin, planulate, usually very oblique to the plane 

 of the aperture : margin thin, irregular. 



Length .48 inch ; breadth .3 inch ; height .29 inch. 



Station. — Unknown. 



Hahiiat. — Panama ; C. B. A. I 



5 specimens were obtained in different stages of growth. 



FamHy— FISSUEELLIDJE. 

 364. Fissnrella sequalis. 



Synonymy. 



Fissurella csqualis Sowb. in Proc. Zool. Soc. Lond. p. 127. Nov. 1834. 



Miill. Synop. Nov. Test. Viv. p. 168. May 1836. 



Sowb. Conch. 111. No. 49. pi. 76. f. 56. 1841. 



Reeve Conch. Icon. pi. 8. f, 55. Dec. 1849. 



Station.— On dead shells in from 6 to 10 fathoms ; Cuming ! 

 Sowerby : also Eeeve. 



Eahitat. — St. Elena; Cuming I Sowerby: also Eeeve. 



Panama ; C. B. A. I 

 5 specimens were obtained. 



