Jackson (1928:141) remarked upon the possibility that intergradation between _pacificus_ and _yaquinae_ took place. He noted also the close resemblance between _yaquinae_ and _bairdi_, and stated (_loc. cit._) that specific affinity between the two might be demonstrated with more specimens. He had a series of eight specimens from Vida, Oregon, seven of which he assigned to _S. o. bairdi_ and one to _yaquinae_. I have examined these specimens and find no more variation between the largest and the smallest than would be expected in any normally variable series of shrews. Vernon Bailey (1936:364) arranged _yaquinae_ as a subspecies of _pacificus_ without giving his reasons for so doing.
_Specimens examined._--Total number, 65. OREGON: _Lincoln Co._: type locality, 2 AW. _Benton Co._: Philomath, 2 BS. _Lane Co._: Mable, 1 OU; Vida, 4 BS, 1 OSC, 3 OU; McKenzie Bridge, 8 OSC, 3 AW, 17 OU, 2 SGJ; Mercer, 1 OSC, 1 OU; Mapleton, 3 BS; Oakridge, 11 OU. _Douglas Co._: Gardiner, 2 BS; Elkhead, 1 BS. _Klamath Co._: Crescent Lake, 3 OU.
_Marginal Records._--OREGON: Yaquina Bay; _Philomath_; McKenzie Bridge; Prospect (Jackson, 1928:140); Crescent Lake; Gardiner.
_Sorex bairdi_ Merriam, N. Amer. Fauna, 10:77, December 31, 1895.
_Sorex obscurus bairdi_, Jackson, Proc. Biol. Soc. Washington, 31:127, November 29, 1918.
_Type._--Adult female, skin and skull; No. 17414/24318, U. S. Biol. Surv. Coll.; obtained on August 2, 1889, by T. S. Palmer, from Astoria, Clatsop Co., Oregon.
_Range._--Northwestern Oregon, south to Otis and east to Portland.
_Diagnosis._--Size medium for the species; average and extreme external measurements of 6 specimens from the type locality are: total length, 126.3 (124-130); tail, 55.0 (52-57); hind foot, 15.0 (14-15). Color Fuscous to Sepia in summer, darker in winter, underparts buffy.
_Comparisons._--For comparisons with _yaquinae_ see account of that subspecies. More reddish and larger than _permiliensis_ with which _bairdi_ intergrades to the east; specimens from Portland show evidence of such intergradation. Some specimens from southern Tillamook County show an approach to _yaquinae_.
_Remarks._--_S. v. bairdi_ lives primarily in forests as do _yaquinae_ and _pacificus_.