562 Bulletin American Museum of Natural History. [Vol. XIX, 



33. Ursus sitkensis Merriam. SITKA BEAR. 



Ursus sitkensis MERRIAM, Proc. Biol. Soc. Wash., X, 73, April 

 13, 1896. Coast, near Sitka, Alaska. 



A single skull, obtained at Sitka. 



34. Ursus horribilis Ord. GRIZZLY BEAR. 



Ursus horribilis ORD, Guthrie's Geogr., 26. Am. ed., II, 1815, 291, 

 299. Montana (Merriam). 



An old female and a male cub, skins and skulls, Shesley 

 Mountains, September 2. The old female measures: Total 

 length, 1626; tail vertebrae, 146; hind foot, 292. Skull: Total 

 length, 332; basal length, 313; zygomatic breadth, 192; inter- 

 orbital breadth, 75; postorbital processes, 105. 



35. Ursus americanus Pallas. BLACK BEAR. 



Ursus americanus PALLAS, Spic. Zool., fasc. xiv, 1780, 5. 



An old male, skin and skull, Shesley Mountains, August 27. 

 Total length, 1524; tail vertebrae, 152; hind foot, 229. Skull: 

 Total length, 260; basal length, 252; zygomatic breadth, 170; 

 interorbital breadth, 69 ; postorbital processes, 99. 



36. Putorius cicognanii richardsoni (Bonaparte). RICHARD- 

 SON WEASEL. 



Mustela richardsoni BONEPARTE, Charlesworth's Mag. Nat. Hist., 

 II, Jan., 1838, 38. " North America" (Great Bear Lake, apud Bangs). 



This animal is represented by 7 specimens, 5 males and 2 

 females, taken as follows: 6 specimens (4 males, 2 females), 

 Telegraph Creek, August 11-15; i male, Level Mountain, 

 September 17. They vary considerably in depth of color, 

 some being much lighter than others, even when taken at the 

 same place, on the same day. An examination of the skulls 

 shows that in the case of both males and females, the palest 

 specimens are very old adults and the darker ones young 

 adults. One specimen (one of the oldest) differs from all the 

 others in having no white on the hind feet and barely a trace 

 of white on the fore feet. 



