76 Panama Shells. PUKPURID^E. 



Monoceros cinyulatum Lam. An. sans Vert. X. 118. No. 1. 



Desh. Ed. . 1844. 



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



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

 We have found it in the same situation. 



ffabitat.-^-Unknown ; Wood. 



Western shores of Mexico ; Humboldt and Bon- 



pland! Lamarck. 

 Western shores of Mexico, those of California; 



Kiener. 



Panama ; Sowerby ; also Jay. 

 Mazatlan ; Melchers ! Menke. 

 Panama ; E. Jewett ! G-ould MSS. 

 Taboga, and Panama ; C. B. A. ! 



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 ! Eeeve. 

 We found this species under stones and in the crevices of 

 rocks near low water mark. 



Habitat. Charles I. Grallapagos ; Cuming ! Reeve. 



Grallapagos ; Jay. 



Taboga ; C. B. A. ! 

 We collected 20 specimens, many of which are immature. 



70. Purpura foreolata. 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 



