t 



224 FAUNA AMERICANA. 



name has been so frequently connected with the 

 most important discoveries in natural science,) is 

 a molar tooth, which, on being compared with 

 the teeth of the Tapirs, both living and fossil, (as 

 well as with those of the Manatus and Kangaroo. 

 with which alone the Tapir could be confounded 

 in this particular,) is recognized as belonging to 

 a very small extinct species of this genus. 



Tamrus mastodontoides, (Nobis.) 



Character. Less than one third the size of the 

 Tapirus giganteiis, or nearly the size of the living 

 Tapir ; crowns of the molars, when worn by de- 

 trition, presenting disks resembling those on the 

 teeth of the Mastodon giganteiis. 



Dimensions. (Of the molar tooth.) Length of 

 the crown one inch four tenths ; breadth one 

 inch; length of the body projecting above the 

 alveole seven tenths; length of the roots one inch 

 two tenths. 



Description. Molar tooth of the upper jaw, 

 left side ; crown nearly quadrangular, traversed by 

 two eminences, rurming obliquely from without, 

 inwards and backwards, united at their external 

 border by a crest of enamel, as in the teeth of the 

 recent Tapir; these eminences are about one 

 half worn, and present disks of an irregular form 

 unlike the other fossil, or the recent Tapirs, but 

 resembling the disks of a half worn tooth of the 

 Mastodon giganteiis. On the posterior part of 

 the bodv of the tooth, near the surface of the 



