ORDER UNGULATA. 



I4OI 



that there is really no distinction between that genus and Mastodon, 

 although the retention of the latter term for the more generalised forms 

 of what would be otherwise a very unwieldy genus is convenient. 



Fig. 1277. — Crown surface of the third left upper true molar of Mastodon latidens ; 

 from the Pliocene of Borneo. Two-thirds natural size. 



With the above-mentioned proviso as to its apparent passage into 

 Mastodon we may note the chief features of the existing genus Elephas. 



Fig. 1278. — Palatal view of the mandible of the Indian Elephant {Elephas hidicus). Greatly- 

 reduced. The hinder portion of the penultimate and the anterior half of the last true molars are 

 in use. 



Thus lower incisors (tusks) are invariably wanting ; the enamel on 

 the upper incisors merely forms a small cap at their extremities :, 



