PLATE XIY. 
Tejon (Eocene) Pelecypoda. 
(Unless otherwise indicated all figures are natural size.) 
Fig. la. Ostrea idriaensis Gabb. U.S.N.M. 165318. Left valve; altitude 114 mm. 
View of exterior. North of Sudden (4518). Characteristic of this 
horizon. 
Fig. lb. View of exterior of right valve of same specimen. 
Fig. 2. Phacoides cumulata Gabb. U.S.N.M. 165328. Right valve; altitude 10 mm. 
View of exterior, X 4. Three miles north of Sudden (4518); also known 
from type locality of Tejon formation. 
13G 
