■Barbour — New Nebraska Mammoth, Elephas hayi. 133 



generally indicates E. primigenius, 6 to 8 E. columbi, and 5 to 6 

 E. imperator. In E. hayi, there are 4 and a fraction transverse 



Fig. 3. 



Fig. 3. Elephas hayi. 



a, vertical section through coronoid ; b, horizontal section near rim of 

 inferior dental foramen ; c, horizontal section through coronoid and angle. 



Fig. 4. Elephas imperator. 



a, vertical section through coronoid and sixth molar ; b, horizontal section 

 near rim of inferior dental foramen ; c, horizontal section through base of 

 coronoid and last molar. For comparison with Elephas hayi. 



enamel ridges to the decimeter. The valleys are deep and 

 bordered by highly crenulated enamel ridges. The great 

 anterior prong branches widely and carries 3 plates. The 



