THE OX TRIBE, 



Genus BOS, 



Is distinguished from other Genera of Ruminantia by pos- 

 sessing hollow persistent horns, growing on a bony core ; 

 the tail long, terminated by a tuft of hair ; and four 

 inguinal mammae. 



THE BISON. 



THE AMERICAN BISON. 



Bos Americanus. 



The head of this animal is enormously large; larger, 

 in fact, in proportion to the size of its body, than that of 



