THE PEOBOSCID^:, OR ELEPHANTS. 



233 



Miocene, which survived longer in America than in 

 the Old World, and one of which continued to exist 

 up to the period of the Diluvial deposits and turf 

 formations, most probably even up to the prehis- 

 toric times of the human race. This is the so- 

 called Ohio animal, the Mastodon giganteum. 



FIG* 41. Portion of a Molar of Mastodon elephantoides. 

 One-half nat. size. After Clift. 



As early as the Upper Miocene we meet with 

 animals of the Mastodon species, with molars, the 

 ridges of which are much more sharply denned and 

 resemble rows of miniature roofs (Fig. 41), inas- 

 much as they consist of numerous small tubercles, 

 which almost coalesce with one another. The tops 



