I poo.] Gidley, A New Species of Pleistocene Horse. 



1^5 



Comparison with E. caballus. 



The nose of E. scotti, from the anterior premolar forward, is 

 as much elongated as in E. caballus and in this character it differs 

 entirely from E. eous which has a very much shortened nose. To 

 make up apparently for the longer molar-premolar series, the 



Fig. 4. Skull uf E. scotti. 



skull is very much shortened in the portion between the last mo- 

 lar and the occipital condyles and most of this shortening seems 

 to be in the basioccipital region, the orbits being placed much 

 farther back. The maxillary ridge commences about the middle 

 of p*, while in E. caballus this ridge does not usually extend far- 

 ther forward than the anterior portion of m'. The vertical 

 thickness of the skull measured immediately behind the last mo- 

 lar is about the same as in the large skull of E. caballus, but the 

 thickness of the forward portion of the skull from the face of 



