130 



SKETCH OF THE HISTORY OF MAMMALIA. 



tinued by a cartilaginous addition, so that the nostrils 

 open at the end of the muzzle. The orbits are situated 

 far forwards, and their margin is very prominent ; the 

 zygomatic arch is broad and strong ; the muzzle advances 

 directly forwards with a very slight gradual downward 

 bend. The dentition of the manatee (Fig. 86) is not 



-Teeth of Manatee. 



correctly ascertained. In adult skulls eight molars on 

 each side are usually found, in others nine or ten ; and 

 Fred. Cuvier observes that, as in some of the ordinary 

 Pachydermata, the anterior molars, worn the first, fall 



