Microtus townsendii (Bachman, 1839) . J. Acad. Nat. Sci. Phila., 8: 60.

TYPE LOCALITY: U.S.A., Oregon, Multnomah Co., Wappatoo (Sauvie) Isl. in lower Columbia River, near mouth of Willamette River .

DISTRIBUTION: Vancouver Isl.; extreme S.W. British Columbia (Canada) south to N. California, along Pacific coast of U.S.A.

COMMENT: Subgenus Microtus; see Anderson, 1959, Univ. Kans. Publ. Mus. Nat. Hist., 9:415-511, and Anderson, 1960, Univ. Kans. Publ. Mus. Nat. Hist., 12: 181 -216. Reviewed by Maser and Storm, 1970, A key to Microtinae of the Pacific Northwest, O.S.U. Book Stores, Corvallis, Oregon.

ISIS NUMBER: 5301410008080043001.