150 University of California Publications in Geology [Vol. 7 



Monterey must depend to a large extent upon the faunal evi- 

 dence, since there are no similar stratigraphic relations existing 

 at the two localities. On the north side of Carmelo Bay there 

 are beds which may be of Eocene age, but no localities were 

 found where the Monterey shale was in contact with them. 



Faunally there appears to be sufficient evidence to correlate 

 the beds at Monterey and the lower portion of the Miocene sec- 

 tion on San Pablo Bay. All of the species of marine inverte- 

 brates that have been reported from the type section at Mon- 

 terey have been obtained from the beds at San Pablo Bay with 

 the exception of Venericardia montereyana Arnold. Pecten peck- 

 ham i Gabb occurs in the lowest shale at Pinole and in the lower 

 portion of the formation at Monterey. Marcia oregonensis Con- 

 rad and Fious kernianum Cooper occur in both formations, the 

 former very commonly. 



The results obtained in this investigation may be stated as 

 follows': The evidence furnished by the fauna of the type section 

 of the Monterey series supports the general assumption that 

 the deposition of the beds at the type locality was approximately 

 contemporaneous with that of the middle and lower portion of 

 the Monterey Miocene appearing on San Pablo Bay. 



