CANIS COKSAC. 119 



in the northern Wolf and, of course, very much less indeed than in 

 C. lagopus. The freshly developed hairs of the summer coat are of a 

 reddish colour. The winter hairs are said to have each a broad silver- 

 white ring, and are black towards the points, producing a general tint 

 which may be a fawn or mouse colour. Indeed the winter coat, 

 which is very thick, may be quite grey. We have found the hairs of 

 the back to be grey for a considerable distance and then rufous, the 

 terminal portions being white. The head above is coloured like the 

 back. The throat, the underparts, and the lips and chin are white ; 

 and the inner sides of the limbs are yellowish white or pale yellow ; 

 the moustache is black. There is a dark grey triangular patch in front 

 of the eye on either side of the muzzle, while a yellowish ring surrounds 

 the eye itself. A band across the chest is reddish, and the outsides of 

 the limbs are of a yellower red. The tail is isabel -yellow at the root, 

 then mixed yellow and black above (the hairs being black towards 

 their points), beneath it is much paler. The terminal portion of the 

 tail is black, and there is a black mark on its dorsum near the root. 

 The ears are yellowish grey externally, but lined with white. The 

 coloration, however, is, as so usual in the Canidce, variable. Thus 

 Radde tells us that the fore paws may be yellow or white; the 

 dorsum of the tail, where the caudal gland is situated, seems to be 

 constantly black. 



Our Plate XXVII. represents a very fine specimen which came from 

 the country of the Ainoor. 



On the back the hairs are grey for a considerable distance, then 

 rufous, while their terminations are white. 



Habitat. From the banks of the Volga and shores of the Caspian to 

 South-eastern Siberia. It is doubtless found in China, but its southern 

 range is uncertain, as also its northern limit, though it does not inhabit 

 Northern Siberia. 



Centimeters. 



Length from snout to root of tail 52' 5 



oftail 25-5 



from heel to end of longest digit 10 - 



of ear 5'0 



