24 



PROCEEDINGS OF THE ACADEMY OP 



Fig. 1. 



Behind the alveoli of the 0. m a x i 1 1 a r e is an indication of a groove, as 

 though a full series of teeth had existed in early life, and been shed, and the 

 alveoli obliterated by deposit of bone. This appearance is, however, deceptive, 

 as the teeth in these animals are not develojjcd from deep seated capsules, but 

 more su[)erficial]y ; perhaps a few very weak teeth were supported by the in- 

 leiument posteriorly. In B. d e c 1 i v i s, where the posterior teeth are mainly 

 so belli in position, the alveoli are very distinct. 



In the teetli of the B. rhino don certain specific characters may be 

 noticed ; thoupjh the animal is much smaller than the B. d e c 1 i v i s, the teeth 

 are quite as laige and as much worn. The median or vertical mandibulars, in- 

 stead of a conic or curved crown, terminate in a broad, rounded, slightly ele- 

 vated summit ; the form of these teeth is clavate. A pair of the oblique man- 

 dibulars have a similar form. 



In. Lin. 



Cervical vertebrae 7 4| 



Dorsal vertebr;^ 10 17 



Lumbar (imperforate) 12 30| 



Caudal (perforate by lateral foramen) 6 Ill- 

 Caudal from first wanting neural spine 11 14.| 



With cranium 16 



Total 7 ft. 102 in- 



[April, 



