1921] 



Stock: Note on an Hipparion Tooth 



2] 



is short and wide, more as in typical Hipparion mohavense, and does 

 not taper anteriorly and posteriorly as in the tooth from the Siestan 

 beds. 



The tooth from the Berkeley Hills suggests again that the horses 

 occurring in the Orindan and Siestan deposits are related to forms 

 found in the Lower Pliocene of California and are near to types known 

 from the Ricardo beds of the Mohave Desert. 



Measurements 



P-?, anteroposterior diameter 



P 1 ?, transverse diameter, exclusive of cement 

 P-?, anteroposterior diameter of protocone ... 



22.6 mm. 

 21 

 7.3 



