34 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



of separation is the division line between the upper and lower 

 Miocene. The uppermost of the remaining four faunal zones 

 is separated from the other three by well-marked faunal dif- 

 ferences. It is lower Miocene in age while the three lower 

 zones are Oligocene. The faunas of the Oligocene in western 

 Washington show a gradual gradation from one zone into an- 

 other. 



Insufficient evidence is as yet available to warrant making 

 direct correlations with the post-Tejon zones of California, 

 yet suggested similarities appear. 



POST-TEJON FAUNAL TABLE FOR WESTERN 

 WASHINGTON 



The following table contains a list of the species occurring 

 in the post-Tejon strata of western Washington. A large 

 number of new and undescribed species are present, which are 

 not included within this list. 



