ci* A 8 



of which only four are common to Ellsmere Canyon. The upper Fernando 



horizon seems to "be very distinct from the lower one. 



n 



Arnold's faunal list from the Etchegoin contains 84 recogniz- 

 7 Arnold, Ralph. U.S. 0.3. Bull. 398 p. 125 



*.#.-*^-'" < ' i * p ^^ t * * " -^ " - * - - -^ ^* ^ * * - - * * (^'^^.^^.^(W < < 



able species, of which twelve are common to Ellsmere Canyon, besides 

 other very closely related species. The Purissima in its lower 

 faunal zone has eight species common to Ellsmere Canyon. The 

 characteristic form Pec ten healyi is found in both the Etchegoin 

 and Lower Purissima, and 10 believed to be characteristic of this 

 horizon. The form of Pecten healyi found in the Upper Purissima, 

 and in the San Diego formation is somewhat thinner, and has the 

 ribs less raised. The Lower Purissima, and the Etchegoin are taken 

 to be the Northern California equivalents in age of the Ellsmere 

 Canyon fauna. 



In conclusion it may be stated that there is a characteristic 

 fauna developed in the lower part of the Fernando, of which 

 Ellsmere Canyon, Pico Canyon, the locality northwest of Camulos, 

 and Mt . San Cayetano are examples. In the standard time scale this 

 horizon is near the line between the uppermost Kiocene and the 



* 



lower Pliocene. 



