150 Panama Shells. MURICIDJS. 



[labio] rugis basilibus nonnullis" Sowb., tlie well defined sinus 

 of the lip, and the sharp continuous ribs, present a group of 

 characters more characteristic of a Mangelia. We are not, 

 however, perfectly satisfied of the specific identity of our shell 

 with Mr. Sowerby's. 



Station. We found our specimens under stones at and below 

 the low water mark of neap tides. 

 Habitat. Annaa and Lord Hood's Is- 



land; Cuming! Sowerby. , 



Columbetta sulcosa. 



Lord Hood's Island ; Jay. 

 Taboga and Panama ; C. B. A. ! 

 170 specimens were collected. 



193. Cerithium acltistiim. 



Synonymy. 



Cerithium adustum Kiener Iconog. p. 37. pi. 13. f, 2 non 3. 



Lam. An. sans Vert. IX. 313. No. 46. 



(Desh. ed.) 1843. 



. Lam. An. sans Vert. III.Pt. 2. p. 611. 



No. 46. (Desk ed. tert.) - 1844. 



There is evidently a transposition, as noticed by Deshayes, 

 Jay, and Menke, in Kiener's references to and names on 'the 

 plate of his figures of this species and of C. maculosum. 



Station. In wet sand, under stones, at half tide level. 

 Habitat. Indian Ocean, Eed Sea; Kiener. 



Indian Ocean, according to Kiener ; Deshayes. 

 Eed Sea ; Jay, 

 Taboga ; C, B. A. ! 



206 specimens were collected. The doubt which Deshayes 

 implies of the accuracy of Kiener's statement of habitat, must 

 be well founded. 



194. Cerithium assimilatum. Nov. sp. 



Shell very long, conic : very dark brownish red, with some 



