FAUNA AMERICANA. 213 



Species. 



2. Mastodon angiistidens, the narrow tooth 

 Mastodon^ Cuvier, Ann. Mus. torn. 8. p. 405. 

 Recherches, sur les Ossem. Foss. 2 edit. torn. L 

 p. 2f)0. pi. 1. fig. 1,2, 3, 7. pi. 2. fig. 6, 7, 8, 9, 10, 

 13. pi. 3. fig. 1,' 2, 3, 4, 5, 8. pi. 4. fig. 1, 2, 3, 6, 7. 

 Animal de Simore, Reaum. Mem. de I' Acad, des 

 Sc. Annee. 1715, p. 174. 



Char. Essent. Molars narrow and elongated, 

 their crowns presenting from detrition, disks of 

 enamel, in form of trefoils. 



Dimensions. One third less than the Mastodon 

 giganteum., and less elevated on the legs. 



Description. The cones of the crowns of the 

 molars, marked by grooves more or less deep, 

 sometimes terijiinating in several points, some- 

 times accompanied by other smaller cones on 

 their sides or intervals, from whence it results 

 that mastication produces upon this crown, at 

 first^, small circles of isolated enamel, and after- 

 wards trefoils or figures of three lobes, but never 

 lozenges ; the first molar, small, with four tuber- 

 cles, and appearing to project perpendicularly; 

 the second with six tubercles, projecting from 

 behind forwards, as likewise the third, which has 

 ten tubercles ; all these teeth do not appear to 

 have existed at the same time in the mouth, the 

 first becoming developed and used, then the se- 

 cond, then the third, which appears alone to oc- 



