74 FOSSIL MAMMALIA. 



nation of numbers of these teeth, concludes that they belonged 

 to a mastodon of a different species from the preceding, and 

 which appears to have left its remains in considerable abun- 

 dance in several parts of the earth. 



All these teeth, like those of the great mastodon, are fur- 

 nished with conic points, more or less numerous, which wear 

 in mastication. The forms of some bones found with these 

 teeth also resemble those of the great mastodon ; and there is 

 some reason to believe that they were also accompanied by 

 tusks. From all this, the Baron concludes that they came from 

 an animal of the same genus. 



But these teeth are distinguished from those of the great 

 mastodon of the Ohio, by Certain specific characters. The 

 principal and most general distinction is, that the cones of their 

 coronals are furrowed more or less deeply, sometimes termi- 

 nated by many points, and sometimes accompanied by smaller 

 cones on their sides, or in their intervals. Mastication, there- 

 fore, produces, first, upon this coronal many small circles, 

 and finally trefoils, or figures with three lobes, but never 

 lozenges. 



These trefbils have sometimes occasioned these teeth to be 

 taken for those of tbe hippopotamus. But, independently of 

 magnitude, the teeth of the hippopotamus have never more 

 than four trefoils, while those of which we are speaking have 

 usually six or ten. 



It is more difficult to determine the specific characters of 

 these various teeth, one with another, — they do not altogether 

 resemble. That they have been differently placed in the jaw, 

 may be judged by the number of the points. There are also 

 differences of age, to be determined by the degree of detrition. 

 The Baron examined two teeth, one from the turquoise mines 

 of Simorre, in Gascony, the other from Peru, and he declares 

 that, notwithstanding the distance between the two places, it 

 was impossible not to recognise at once the specific identity of 

 these teeth. 



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