14 BOViDJi. 



B. Bisons. — Covered with short, crisp wool. Hhmddcr Jiigher than the 

 haunches. Cannon-hone of the hind leg longer than the fore. Ribs 

 fourteen or fifteen pairs. Jnterma.villaries very short, not 7warly reach- 

 ing the nasals. 



5. BISON. 



Muffle short and scarcely reaching the hinder edge of the nostrils, 

 as wide as the space behind the inner edge of the nostrils. Horns 

 round, rather depressed at the base, lateral, coming out before the 

 edge of the occiput, curved upwards and outwards. Skull : the 

 frontals arc broader than long. (Gray, Cat. Ungul. B. M. p. 35, 

 t. 4. f. 1, 2, skull.) 



1. Bison bonassus. (The Bison.) B.M- 



Tarsi elongate ; fore aud hind quarters subequal. 



Bison boncassus, Gray, Cat. TJngul. B. M. p. 30. 



Bison americanus, Gray, Cat. Ungul. B. M. t. 4. f. 1, 2 (skull). 



• Hah. Poland and Caucasus. 



2. Bison americanus. (The American Bison.) B.M. 



Tarsi short ; hind quarters very low. 



Bison americanus, Gray, Cat. Ungul. B. M. p. 38 ; Cuvier, Oss. Foss. 



(skull). 

 Bos americanus, Baird, Mam. N. A. p. 082. 



Hab. North America. 



2. Tail elongate, equine, covered liith long hair from the base. Wiiffle 

 subbovine, rather narrow belmv. Hair during the cold season very 

 long and pendent. Interynaxillaries elongate, not reaching quite to the 

 tiasals. — Yaks. 



6. POEPHAGUS. 



Horns subcylindrical, curved outwards on the front of the occi- 

 pital ridge. Nose haiiy, with a moderate-sized bald muffle between 

 the nostrils. Hoofs moderately thick, not ^ilat^d or expanded on 

 the outer side, square, and straight in front. (Gray, Cat. Ungul. 

 B. M. p. 39, t. 5. f. 3, 4, skull and horns). 



1. Poephagus grmmiens. (The Yac or Sarlj-k.) B.M. 



Black ; back and tail often white. 



Poephagus p-unniens, Gray, Cat. Ungul. B. M. p. 40, t. 4. f. 3, 4 

 (skull and horns). 



Hah. Thibet. 



" The yomui calf is black, with a tuft of long pale yellow hair across 

 the crown of the head -. the underside of the body aud tlie tail are 

 covered -with rather long pale yellow hair ; the dorsal streak, whicli 

 is broader over the withers and rump, and interrupted on the middle 

 of the back, is white."— (?/w/, P. Z. S. 1853, p. 191, pi. 35. B. M. 



