32 



CATALOGUE OF UNGULATES 



inwards and upwards, frequently with a more or less marked 

 backward inclination at the tips. Those of cows much more 

 slender. Hair of head and upper-parts comparatively short 

 and smooth, but on lower part of flanks elongated into a 

 pendent fringe extending across shoulders and thighs ; a tuft 

 of long hair on chest, and sometimes a shorter one on withers ; 

 lower half of tail enveloped in a mass of still longer hair, 

 reaching somewhat below hocks. Colour (in wild race and 



r 



FIG. 14. SKULL AND HOKNS OF YAK (Bos grunniens). 



pure-bred tame animals) uniformly blackish brown, with the 

 exception of a little white in the neighbourhood of the 

 muzzle, a sprinkling of grey on the head and face of old 

 individuals, and a tendency to rusty on the back of aged 

 bulls. 



The grunting sound from which the yak takes its specific 

 name is stated by Przewalski to be restricted to the tame 

 breeds, one of which apparently forms the type; the wild 

 race may be known as 



