SHAWANGUJSTK HEAD. Ill 



therefore could not have contained the same amount of substance. Hence 

 we might be led to doubt whether this species of Dinotherium was a larger 

 animal than the Mastodon. 



The elevation of the cranium exceeds that of the great skeleton. It cranium, 

 differs in the curve of the intermaxillary bones ; for these are nearly straight 

 in the one, while in the other they are curved from behind forwards, so that 

 the anterior extremity of the tusk-socket is turned a little upwards. The 

 sockets themselves contain the butts of the tusks projecting a few inches 

 from the cavities ; the remainder, though perfect when found, having been 

 since decomposed. 



The mandibular extremity of the lower jaw is, in diameter, an inch Manaiwe. 

 broader than in the great skeleton. It has no existing tetracaulodon tusks ; 

 but the traces of their sockets are visible on both sides, especially on the 

 right, from which the tusk had disappeared more recently than from the 

 other. Both tusks, probably, were shed at an earlier period of life than 

 in the great skeleton, which exhibits one tusk, and a deep depression 

 originally occupied by the other. 



Another peculiarity relating to this head regards the number of teeth, Number 



of 



compared with its advanced growth. The head of an old Mastodon contains, Tee th. 

 as we see in the Baltimore specimen, a single large terminal, five-ridged, 

 ten-pointed molar on a side. In the heads of the great skeleton, and of 

 that at Cambridge, we find two molars on each side in each jaw, making 

 eight in the whole; while in this there are on the right side in both jaws 

 three molars, on the left two, and an anterior socket partially filled. On 

 the right side are anteriorly the second six-pointed molar, much worn, and 

 nearly ready to be shed, as the corresponding tooth on the other side had 

 already been ; next, the largest six-pointed or penultimate molar ; third, 



