=District of Mackenzie.= Baillie Island, 1[75]; Franklin Bay, 1; Langton Bay, arm of Franklin Bay, 15 mi. S of, 1[2]; Cockburn Point, 69°N, 115°W, 2[77]; Dolphin and Union Strait, 1[77]; Bernard Harbor, 2[77]; Kent Peninsula, 4[95]; Horton Riv., near Fort Anderson, 1; Fort Anderson, 6; Anderson River, 3; Barry Island, Bathurst Inlet, 1[77]; Fort McPherson, 1; Peels River, 2; Arctic Red River, 8[75]; Fort Good Hope, 6; Clinton Colden, 1[2].
=Yukon.= Kamarkak, 1[77]; Herschel Island, 1[75]; Lapierres House, 2; Forty Mile, L. T. Coal Cr., 4[74]; head of Coal Cr., 1; Macmillan River, Forks, 1; 20 mi. W. Ft. Selkirk, 1; Slims River, near Kluane, 1[75]; head of Lake Lebarge, 1.
=Mustela erminea polaris= (Barrett-Hamilton)
_Putorius arcticus polaris_ Barrett-Hamilton, Ann. and Mag. Nat. Hist., 13 (ser. 7):393, May, 1904.
_Mustela erminea_, Manniche, Meddelelser on Grønland, 45:80-85, 1 fig., 1910.
_Mustela arctica polaris_, Miller, U. S. Nat. Mus. Bull., 79:97, December 31, 1912.
_Mustela erminea polaris_, Hall, Journ. Mamm., 26:179, July 19, 1945.
_Type._--Probably female, skin only; no. 78. 6. 19. 11, Brit. Mus. Nat. Hist.; Gap Valley, 7-1/4 miles northeast Cape Brevoort, 82° N, 59° 20´ W, Northwestern Greenland; June 15 or 16, 1876; obtained by Lewis A. Beaumont.
The skin is in full, fresh summer pelage, fairly well stuffed except for the tail which is unstuffed; the whole is in a good state of preservation.
_Range._--North coast, and east coast as far south as Turner Sound (between 69 and 70 degrees) of Greenland. See figure 25 on page 95.
_Characters for ready recognition._--Differs from _M. e. arctica_ in lighter upper parts (near [_j_] Buckthorn Brown rather than Raw Umber or darker) and more intensely-colored underparts that are Buff Yellow rather than Sulphur Yellow, Colonial Buff, or Primrose Yellow; from _M. e. semplei_ in color in same fashion as from _arctica_ and in larger size of skull.
_Description._--_Size._--Male: One subadult and two adults (one ad. from Scøresby Sound and other two from Ymer Island) measure as follows, the average being given first: Total length, 318 (301, 320, 315); length of tail, 72 (69, 70, 73); length of hind foot, 46.5 (44, 46, 47).
Female: No measurements taken in the flesh available but hind foot, measuring 33.5 in the dried state and therefore approximately 35 in life.