1919] Merriam: Tertiary Mammalian Faunas of Mohave Desert 547 



specimen is almost identical in its character with the form known 

 from the Barstow fauna, but is slightly larger. The position of the 

 angle indicates a character of the feline rather than a machaerodine 

 group if this form is a felid. The angle is farther removed from the 

 condyle than in the more specialized machaerodine forms. It is also 



Fig. 160. Tetrabelodon?, sp. Mandible, no. 22(581, lateral view, X 

 Eicardo Pliocene, Mohave Desert, California. 



almost immediately below the posterior side of the base of the coronoid 

 process, whereas in the specialized machaerodine forms the angle is 

 situated below the outer end of the condyle. 



RODENTIA 



A small astragalus, no. 21496, like that of a jackrabbit, from 

 locality 1805 in the Ricardo, represents a rodent type near Lepus or 

 Ilypolagus. Other material, possibly of this form, is shown in figures 

 158ffl to 159. 



