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tusks, eleven and three-twelfths feet long from their roots, and nine 

 or ten inches in diameter — one foot and three inches of their length 

 being inserted into the sockets. These tusks are semicircular, and 

 stand out horizontally, with the concavity backwards. Thus placed, 

 they are fifteen feet in a straight line, from the lip of the one to the 

 tip of the ottier. Notwithstanding they were found in this position, 

 very just doubts, Dr. Horner thinks, may be entertained of its being 

 the natural one, as, in a state of decay of the alveolus, they might 

 readily gravitate outwards, so as to assume that direction subsequent 

 to the death of the animal. This specimen was in fact very much 

 decayed, when Mr. Koch found it, and appears to have been fractured 

 by rocks falling on it from the bluff above. The means taken to pre- 

 serve it obscure the surface of the bones, as well as their configura- 

 tion, and in attaching the fragments together, some have been put 

 very much out of their position. For example, the glenoid cavity of 

 the right side is monstrously far from the hind tooth, and is laterally 

 much beyond its line: the intermaxillary bones are too long, and 

 on comparing the position of the posterior molar teeth of the upper 

 jaw with that of the lower, the upper molar teeth are found to be 

 ten inches or more in advance of the lower, a relation so false and 

 so unsuited to mastication, that it is not at all probable nature 

 formed them thus. The molar teeth are four in number in each jaw, 

 two on a side ; the posterior one is seven inches long by four wide ; 

 the anterior, four and a half inches long by four wide. The confor- 

 mation of the teeth is exactly that of the Mastodon, and the ridges and 

 denticules are scarcely worn at all, a proof that the animal was not 

 old. The upper part of the cranium of this animal is defective. The 

 general configuration of the head is so amorphous, the fragments of 

 which it is composed have their position so imperfectly regulated, 

 and the whole surface is so coated with glue and paint, to preserve 

 it, that an exact examination was impracticable. Its length is so 

 extraordinary, that Dr. Horner considers it can scarcely be re- 

 ceived as natural, and he is inclined to the opinion, from its den- 

 tal system, that it belongs to the Mastodon ; that by some accident 

 the remains of two heads were found in the same line ; that if 

 there be but one, it has been much fractured, and a large quantity 

 of extraneous matter blended with it, which it is difficult to dis- 

 tinguish. The latter conjecture, Dr. Horner thinks, is rendered 

 more probable by the admission of Mr. Koch, that these bones were 

 cemented to a layer of gravel a foot and a half in thickness, with 



