233 



TRICHECHUS. WALRUS. 



Generic Character. 



Dentes Primores (adulto) nulli 

 utrinque. 



Laniarii superiores solitarii. 



Molares ex osse rugoso utrin- 

 que. 



Labia geminata. 



Pedes posteriores compedes 

 coadunati in pinnam. 



Fore-teeth (in the full-grown 

 animal) none either above 

 or below. 



Tusks solitary, in the upper 

 jaw. 



Grinders, with wrinkled sur- 

 faces. 



Lips doubled. 



Hind-feet, at the extremity 

 of the body, uniting into a 

 fin. 



HE genus Trichechus is entirely marine, and 

 contains but very few species : of these the princi- 

 pal is the Trichechus Rosmarus, or, as it is some- 

 times called, the Sea Horse, or Walrus. 



