1913] Merriam: Horses of Rancho La Brea 401 



The mandible is heavy in contrast with that of the modern 

 horse, and the horizontal ramus is much higher below the anterior 



Fig. 4. Equus occidentalis Leidy. Posterior view of skull. No. 21002, 

 X %. Eaneho La Brea Beds, California. 



cheek-teeth and below the diastema. The symphysial region is 

 relatively wide. The mandible of a specimen (no. 21000), 

 tentatively referred to E. occidentalis, shows unusual width 



Figs. 5 and 6. TSqyms occidentalis Leidy ( ?). Mandible, no. 21000, X %. 

 Eaneho La Brea Beds, California. Fig. 5, lateral view; fig. 6, superior 

 view. 



