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University of California Publications in Geology [Vol. 7 



the Orindan section near Tassajara Canon on the south side of 

 Mount Diablo. The material is all very fragmentary and is not 

 susceptible of even certain generic determination. 



The specimen from Bolinger Canon consists of fragments of 

 cheek-teeth and portions of a lower jaw of an animal of con- 

 siderable size. 



The specimens from near Tassajara Canon include fragments 

 of teeth. They represent an animal of the mastodon type but 

 the fragments are too imperfect for certain generic identification. 



DIPOIDES LECONTEI (Merriam, J. C.) 

 Prom Siestan beds near Bald Peak. 



The type specimen (figs. 8a to 8c), consisting of the anterior 

 part of a skull with three cheek-teeth on each .side, was discovered 

 in the Siestan beds near Bald Peak. A single lower molar has 

 since been found in the same beds. 



8c 9a 



Figs. 8a to 8c. Dipoides lecontei (Merriam, J. C). Type specimen 

 natural size. Fig. 8a, superior view of skull; fig. 8b, lateral view of skull; 

 fig. 8c, superior cheek-teeth. Siestan beds, near Bald Peak. 



Figs. 9a and 9b. Dipoides, sp. P„ X 2. Fig. 9a, outer side; fig. 9b, 

 occlusal view. Siestan beds, near Bald Peak. 



