78 Panama Shells. PURPUBlD-fi. 



Monoceros cingulatum Lam. An. sans Vert. X, 118. No. 1. 



Desh. Ed. . 1844. 



Keeve Conch. Icon. pi. 3. f. 11. Sept. 1846. 



Station. — In clefts of rocks at low water ; Cuming 1 Eeeve. 



We have found it in the same situation. 



Habitat. — Unknown ; Wood. 



Western shores of Mexico ; Humboldt and Bon- 



plandl Lamarck. 

 Western shores of Mexico, those of California; 



Kiener. 

 Panama ; Sowerby ; also Jay. 

 Mazatlan ; Melchers 1 Menke. 

 Panama ; E. Jewett I Gould MSS. 

 Taboga, and Panama ; 0. B. A. I 

 We obtained 75 specimens, a majority of which are young, in 

 part at Panama, but mostly at Taboga. 



69. Purpura Carolensis. 



Synonymy. 



Purpura Carolensis Reeve Conch. Icon. pi. 11. f. 57. Sept. 1846. 



Station. — Under stones at low water ; Cuming 1 Reeve. 

 We found this species under stones and in the crevices of 

 rocke near low water mark. 



Habitat. — Charles I. Gallapagos ; Cuming ! Reeve. 



Gallapagos ; Jay. 



Taboga ; C. B. A. I 

 We collected 20 specimens, many of which are immature. 



70. Purpura foTeolata. Nov. sp. 



Shell obliquely rhombic : white : with very prominent com- 

 pressed transverse ridges, about nine on each whorl, and four 

 spiral keels which are very prominent and much compressed, of 



