'^°[89l'''] proceedings of the national museum. 327 



160. Litorina peruviana, Lam. 

 =X. zehra Wood. 



One young specimen. 

 Payta. 



161. Litoiina varia pSby. 



Two specimens. 

 Panama. 



162. Litorina conspersa Phil., variety. 



Two examples. 

 Payta. 



163. Mitrularia cepacea Bred. 

 =^Calyptrea cepacea Brod., auct. 



One fractured specimen. 

 Mauta. 



Carpenter, in Smithsonian Check-list (of West Coast shells), 1860, 

 catalogues this by the latter name. 



164. Crucibulum spinosum Sby. 



Generally distributed. 



Bahia(l); Payta (20) ; Manta (2); Chatham Island, Galapagos (1). 

 Extends northward to Monterey Bay, California. 



165. Crucibulum imbricatum ^hy. 



Nine examples from one-half to 2i inches diameter. 

 Payta; Manta (1). 



166. Crepidula aculeata Gmeliu. 



Sixty-two specimens in various conditions and of all sizes, from tiny 

 adolescent examples to strong adult shells. 

 Payta. 



167. Crepidula dilatata Lam. 



Beach shells. 

 Pacasmayo; Manta. 



168. Crepidula strigata Brod. 



Two specimens. 

 Pacasmayo. 



169. Crepidula arenata Brod. 



Five; four adult. 



Payta. 



When in a perfect state an exceedingly jjretty shell, pinkish inside, 

 fading to a light yellowish brown around the edge, and the edge mottled 

 with dark brown. 



