Remarks.—One large, unsexed skull from Buckinghorse River with part of the rostrum gone has the frontal shield strongly dished. A young adult female taken 10 miles west of Fort Nelson on August 23, 1948, has the following external measurements: Total length, 1345; tail, 65; hind foot, 256; ear from notch, 135.
Ursus species
Grizzly
Specimens examined.—Total 5, as follows: Yukon Territory: E side Aishihik River, 17 mi. N Canyon, 1; Unahini River, 5 mi. N and 1 mi. E Dalton Post, 1; Unahini River, 3 mi. N and 1 mi. E Dalton Post, 2. British Columbia: Buckinghorse River, 94 mi. S Fort Nelson, 1.
Remarks.—Of three specimens obtained at the Unahini River, two males resemble each other closely, while the third, an old adult represented by an unsexed skull with broken cranium, is markedly different, the skull being noticeably shorter with shorter rostrum and lower jaw and other distinctive features. It closely resembles the skull of an adult male taken at the Aishihik River. Furthermore, the first two animals show close relationships with an unsexed skull which Alcorn obtained at the Buckinghorse River in British Columbia.
Two males taken at the Unahini River in the Yukon Territory have the following external measurements: Total length, 1933, 1812; tail, 150, 96; hind foot, 262, 260; ear from notch, 129, 131. Other specimens, skulls only, obtained from native hunters, are partly broken. Alcorn writes that the local hunters always shoot a grizzly in the head to be certain that it is dead.
Mustela erminea arctica (Merriam)
Ermine
Putorius arcticus Merriam, N. Amer. Fauna, 11:15, June 30, 1896. (Type from Point Barrow, Alaska.)
Mustela erminea arctica Ognev, The mammals of U. S. S. R. and adjacent countries, 3:31, 1935.