_Sorex obscurus longicauda_ Merriam, N. Amer. Fauna, 10:74, December 31, 1895. _Type._--Adult male, skin and skull; No. 74711, U. S. Biol. Surv. Coll.; obtained on September 9, 1895 by C. P. Streator, from Wrangell, Alaska. _Range._--The British Columbian and Alaskan coasts from Rivers Inlet north to near Juneau and also certain islands including Etolin, Gravina, Revillagigedo, Sergeif, and Wrangell. _Diagnosis._--Size medium for the species, tail relatively long; average and extreme measurements of 17 specimens from the type locality are: total length, 128.4 (122-138); tail, 57.8 (53-66); hind foot, 15.1 (14-16). Color dark in summer and winter. _Comparisons._--For comparison with _S. v. setosus_ see account of that subspecies. Larger and darker than _S. v. obscurus_ with which it intergrades east of the humid coastal region; larger and darker than _S. v. alascensis_ with which it intergrades in the Lynn Canal area; larger and darker than _S. v. calvertensis_ which occurs on Calvert Island and Banks Island, British Columbia; differs from _S. v. insularis_ of Smythe, Townsend, and Reginald islands in larger size and blackish rather than brown winter pelage; larger and relatively longer-tailed than _S. v. elassodon_ which occurs on most of the islands west of the range of _longicauda_; larger and relatively longer-tailed than _S. v. isolatus_. _Specimens examined._--Total number, 151. ALASKA: Wrangell, 54 BS; 8 AMNH; Crittenden Creek, 1 BS; Ketchikan, 2 BS; Loring, 11 BS. BRITISH COLUMBIA: Port Simpson, 25 BS; Inverness, 15 BS; head of Rivers Inlet, 35 BS. _Marginal Records._--BRITISH COLUMBIA: Great Glacier, Stikine River (Jackson, 1928:133). ALASKA: Burroughs Bay (_ibid._). BRITISH COLUMBIA: Bella Coola region (Anderson, 1947:19); head of Rivers Inlet; Spider Island (Cowan, 1941:101); Goose Island (Cowan, 1941:99); Princess Royal Island (Cowan, 1941:98); Pitt Island (_ibid._); Metlakatla (Jackson, 1928:133); Port Simpson. ALASKA: Gravina Island (_ibid._); Helm Bay (_ibid._); Etolin Island (_ibid._); Sergeif Island, mouth of Stikine River (_ibid._); Sumdum Village (_ibid._); Port Snettisham (_ibid._). =Sorex vagrans mixtus= Hall _Sorex obscurus mixtus_ Hall, American Nat., 72:462, September 10, 1938. _Type._--Adult male, skin and skull; No. 70376, Mus. Vert. Zool.; obtained on May 4, 1936, by R. A. Cumming, from Vanada, Texada Island, Georgia Strait, British Columbia. _Range._--Known only from the type locality. _Diagnosis._--Size medium; average and extreme measurements of 5 specimens from the type locality are: total length, 111 (108-117); tail, 48 (44-49); hind foot, 12 (12-13) (Hall, 1938:463). _Comparisons._--Color much as in _S. v. setosus_ or _S. v. isolatus_; palate longer than that of _isolatus_ or _setosus_; hind foot shorter than either; smaller than _S. v. longicauda_. =Sorex vagrans isolatus= Jackson _Sorex obscurus isolatus_ Jackson, Jour. Washington Acad. Sci., 12:263, June 14, 1922.