32 AMERICAN JOURNAL 



PECTEN, Brug. 



P. PURPURATUS, Lam. 



Pecten purpuratus, Lam., Anim. s. Vert. (Desh. Edit.) v. 7, 

 p. 134. 



A common Peruvian shell, represented by three specimens in 

 the collection. 



OSTREA, Linn. 

 0. GALLUS, Val. 



Ostrea galhis, Valenc, Voy. Venus, pi. 21, figs. 1 a — d. 



Compare 0. cerrosensis, Gabb, Pal. Cal.'v. 2, p. 35, pi. 11, 

 fig. 61. 



Two fine specimens imbedded in a gray sandstone, unlike that 

 associated with any others of the specimens. 



A few other Tertiary fossils were sent, but they are two im- 

 perfect for satisfactory determination, without additional ma- 

 terial. 



