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.
Remarks.—Those males with worn teeth seem to have a slightly longer and deeper rostrum with a larger, more inflated cranium than specimens of S. p. navigator from Washington, but in other ways resemble typical S. p. navigator. An adult male, with slightly worn teeth, from Dezadeash Lake has sagittal and lambdoidal crests. All of the water shrews were taken in July and early August and at the edge of water in traps baited with rolled oats. None of the females had embryos.