MAMMALIA. 



329 



flexible proboscis, which reaches the ground and serves as a 

 prehensile instrument ; the genus ElepJias is the only ex- 

 isting type of this family, but the discoveries of Cuvier have 

 added the extinct genus, Mastodon, which resembled the 

 elephant in its general form (fig. 238), but differed from it in 



FIG. 239. Elephas primigenius, or mammoth, from Brighton cliffs. Molar 

 lower jaw, right side, one third of natural size. 



FIG. 240. Mastodon ohioticus. Molar tooth, one-fourth of natural size. 



the structure of its molar teeth, the crowns of which, as 

 shown in fig. 240, presented a series of conical mammillated 



