106 PALAEONTOLOGY OF CALIFORNIA. 



A. lampe, Gray. 



Anomia lampe, Gray ; Proc. Zool. Soc, 1849, p. 115. 

 Post-Pliocene, San Pedro. Living. 



OSTHEA, O. Boukgeoisii, Eem. 



Ostrea Bourgeoisii, Eem. ; Proc. Cal. Acad., 1863, p. 13. 

 Id., Gabb; Pal. Cal., Vol. 2, p. 33, pi. 11, fig. 57. 

 Pliocene, Kirker's Pass. 



0. Attwoodii, Gabb. 



Ostrea Attwoodii, Gabb ; Pal. Cal., Vol. 2, p. 33, pi. 10, fig. 58 ; pi. 11, fig. 586. 

 Miocene or Pliocene, (?) San Lorenzo Valley, Monterey County. 



O. Tayloriana, Gabb. 



Ostrea Tayloriana, Gabb; Pal. Cal., Vol. 2, p. 34, pi. 12, fig. 60. 

 Miocene, Santa Inez Mts., near Santa Barbara. 



O. Yeatchii, Gabb. 



Ostrea Veatchii, Gabb; Pal. Cal., Vol. 2, p. 34, pi. 11, fig. 59. 

 Post-Pliocene, Cerros Island, and near Loreto, Lower California. 



O. Cerrosensis, Gabb. 



Ostrea Cerrosensis, Gabb ; Pal. Cal., Vol. 2, p. 35, pi. 11, fig. 61. 

 Compare O. gallus, Val. ; Voy. Venus. 

 Post-Pliocene, Cerros Island. 



I have received from Prof. Raimondi, of Lima, Peru, an oyster from the late 

 Tertiary deposits of Payta, which leads me to suspect the specific identity of Cer- 

 rosensis with the form figured by Valenciennes in the Voyage of the Venus, under 

 the name of O. gallus. The only important difference is in size. The Peruvian 

 fossil agrees in size with the figure of the recent form ; while my fossil is not more 

 than half as large. Should no other characters show themselves, gallus will have 

 to stand as the name of the species. 



O. LURIDA, Cpr. 



O. lurida, Cpr. ; Rep. on West Coast Mollusca, 1863, p. 645. 

 Post-Pliocene, Benicia. Living. 



