380 



SUPPLEMENT AEY NOTE. 



teeth ill all ; the Manatee has forty-eight teeth altogether, viz. : 4 

 milk-iucisors (which speedily disappear), aud 44 molars and pre- 

 molars, resembling, in pattern, the same teeth in the HipjMjJo- 

 tainiis, but veiy much smaller. The extinct edentulous Rhytina is 

 nearer the Dugong than any other living species, having only two 



Manatee. 



milk incisors, the absence of teeth being supplied by a horny cover- 

 ing on the jaws, gums, aud palate, of peculiar structure, enabling 

 the animal to masticate its food. These distinctions between the 

 three genera of Manatee, Dugong, aud Rhytina, are illustrated in 



Dugong. 



the accompanying woodcuts, drawn from skulls preserved in the 

 British Museum of Natural Historv, Cromwell Road, where 



