1903.] Allen, Mammals from Northeast Siberia. 165 



length, the anterior narial opening is much shorter, and the 

 molars differ in relative size and form. It much more re- 

 sembles in general contour and proportions the skull of the 

 Barren Ground Bear (Ursus richardsoni), as perhaps should 

 be expected. The present skull measures: Total length, 390 

 mm.; basal length, 355; zygomatic breadth, 235; inter- 

 orbital breadth, 105; breadth at postorbital processes, 141. 

 These measurements are much less than those given by Mid- 

 dendorff of a very old skull from Great Schantar Island, and 

 slightly less than those of his 'middle-aged' skull from Uda- 

 Bucht. 



A second flat skin, No. 18176, without skull or data, is sim- 

 ilar to No. 18175, except that it is rather smaller and less 

 dark, with a distinct shade of gray over the posterior half of 

 the back, and the shoulders, nape, and top of the head are 

 paler fulvous. Two much smaller skins, evidently of quite 

 young animals, are very dark brown, like the adult male 

 first described, with the light tips of the hairs of the posterior 

 back gray, and of the front part of the dorsal region and head 

 yellowish gray, but very much less fulvous than in the adult. 

 One of these specimens (obtained by Mr. Bogoras at Marcova) 

 has a broad transverse band of white across the hind neck, 

 and a small white spot on the middle of the belly, due appa- 

 rently to albinism. 



A third small flat skin, probably young of the year, labelled 

 as from Marcova, without a skull, is widely different in colora- 

 tion from any of those above described. The ears, limbs, 

 sides, and ventral surface are dark brown, tinged slightly 

 with gray; the dorsal region is gray, becoming brighter an- 

 teriorly, the nape being pale fulvous, and the crown and 

 cheeks pale golden fulvous. This could well be called a 

 'yellow' bear. Mr. A. J. Stone suggests to me that its light 

 color indicates that it is a female, as he has found that the 

 female of the great Alaska Bear differs from the male, just as 

 this specimen differs from the other specimens of this series. 



" Russian 'name, M8d-v6hd. Bears are undoubtedly very 

 common in the country around the head of Okhotsk Sea, as 

 well as in the Anadyr and Kolyma River territories, along 



