_Specimens examined._--Total 12, as follows: _Yukon Territory_: McIntyre Creek, 2250 ft., 3 mi. NW Whitehorse, 1; SW end Dezadeash Lake, 2; 1½ mi. S and 3 mi. E Dalton Post, 2500 ft., 1. _British Columbia_: Stonehouse Creek, 5½ mi. W jct. Stonehouse Creek and Kelsall River, 4; W side Mt. Glave, 4000 ft., 14 mi. S and 2 mi. E Kelsall Lake, 1; Hot Springs, 3 mi. WNW jct. Trout River and Liard River, 1. _Alberta_: Assineau River, 1920 ft., 10 mi. E and 1 mi. N Kinuso, 2. _Remarks._--Some of the shrews taken in extreme southwestern Yukon Territory (1½ miles south and 3 miles east of Dalton Post) and in extreme northwestern British Columbia (Stonehouse Creek and Mt. Glave) show evidence of intergradation with the coastal subspecies, _S. o. alascensis_, in length of hind foot. These individuals have a long hind foot (14 and 15); the hind feet of specimens from the other localities listed measure 13 and 14. Alcorn, like Rand (1944:35), found the dusky shrew to be less common than the cinereous shrew; both were taken in the same trap lines. The dusky shrew was taken at a higher altitude (4000 feet, on Mt. Glave) than the cinereous shrew. Sorex obscurus shumaginensis Merriam Dusky Shrew _Sorex alascensis shumaginensis_ Merriam, Proc. Washington Acad. Sci., 2:18, March 14, 1900. (Type from Popof Island, Shumagin Islands, Alaska.) _Sorex obscurus shumaginensis_ J. A. Allen, Bull. Amer. Mus. Nat. Hist, 16:228, July 12, 1902. _Specimens examined._--Total 3, as follows: _Alaska_: 1 mi. NE Anchorage, 100 ft., 1; Glenn Highway, 6 mi. WSW Snowshoe Lake, 2. _Remarks._--These three shrews, in comparison with those referred to _S. o. obscurus_, are paler, and the one complete skull has a slightly higher braincase. All of the specimens were obtained in grassy areas adjacent to the roadway. Sorex obscurus alascensis Merriam Dusky Shrew _Sorex obscurus alascensis_ Merriam, N. Amer. Fauna, 10:76, December 31, 1895. (Type from Yakutat, Alaska.) _Specimens examined._--Total 22, as follows: _Alaska_: E side Chilkat River, 100 ft., 9 mi. W and 4 mi. N Haines, 12; 1 mi. S Haines, 5 ft., 10. Sorex palustris navigator (Baird) Water Shrew _Neosorex navigator_ Baird, Report Pacific R. R. Survey, 8, pt. 1, Mammals, p. 11, 1857. (Type from near head of Yakima River, Cascade Mountains, Washington.) _Sorex_ (_Neosorex_) _palustris navigator_ Merriam, N. Amer. Fauna, 10:92, December 31, 1895. _Specimens examined._--Total 20, as follows: _Alaska_: E side Chilkat River, 100 ft., 9 mi. W and 4 mi. N Haines, 2. _Yukon Territory_: McIntyre Creek, 2250 ft., 3 mi. NW Whitehorse, 11; SW end Dezadeash Lake, 2; 1½ mi. S and 3 mi. E Dalton Post, 2500 ft., 3. _British Columbia_: Stonehouse Creek, 5½ mi. W jct. Stonehouse Creek and Kelsall River, 2.