233 



TRICHECHUS. WALRUS. 



Generic Character. 



Denies 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. 



JL 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. 



