12 lihinoceroidfs Alleghajuensis. 



Inch. lOths. Inch. lOths 



Shortest diameter in height of the superior ? q 17 



maxillary bone, anterior to the molars, ) 

 Length of the single incisor, ..... 23 



Do. of the 2 incisors, 2 3 



Height of the same, 7 8 



Distance from the anterior extremity of bone, ^ 



to the curve upwards, to form the anterior / 6 5 5 



nares, ) 



Length of the cutting edge of the anterior i . 2 



incisor of fossil, j 



Do do. of the posterior do. do. 1 1 



Total length of the fossil fragment, 7 6 



" I find nothing in the works of Baron Cuvier, or any other na- 

 turalist, which indicates any knowledge of this animal in Europe ; 

 and it is, as far as I am apprised, the first specimen of the kind 

 discovered in America. Notwithstanding the affinity, w^hich the 

 agreement of these comparative dimensions appears to establish 

 between it and the genus rhinoceros, still, the great space be- 

 tween the intermaxillary suture, (very distinct in the fossil,) and 

 the place of the first molar, being in the fossil twice as much as 

 in the recent R. Indicus : also the occupation by two incisors in 

 the fossil, of the space allotted to one incisor in the R. Indicus, 

 are conspicuous characters, which establish it as a new genus of 

 the order Pachydermata. 



"I forbear to ground any argument for a great antiquity to this 

 fossil, from its mineral structure ; and I leave to more experienced 

 naturalists to determine, whether its period ought to be referred 

 nearer to the Palaeotherium, than to the elephant; the last of 

 w^hich animals, has left many remains here. 



" Unwilling to designate it by any fanciful or philonymic ap- 

 pellation, and thinkuig that by some naturalists it may be judged 

 to stand in the same relation to the genus rhinoceros, that the 

 elephant does to the mastodon, I have provisionally named it 

 Rhinoceroides Alleghaniensis, by which appellation I have at- 

 tempted to convey in the simplest terms, its con-generic relation, 

 and its territorial habitat. I remain, my dear sir, most faithfully 

 yours, G. W. Featherstonhaugh. 



Philadelphia, April 3, 183L 



