MAMMALS OF SHASTA. 
Sorex shastensis sp. nov. Shasta Shrew. 
Type from Wagon Camp, Mount Shasta (alt. 5,700 ft. in the lower part of the Cana- 
dian zone). No, 95450, U. 8. Nat. Mus., Biological Survey Coll. Collected Sept. 
26, 1898, hy W. H. Osgood. Orig. No. 317. 
Characters.—Size small; decidedly smaller than & vagrans; tail 
rather short; ears small, but conspicuous. Third unicuspid smaller 
than fourth. Skull and teeth peculiar. 
Color.—Type specimen, in change from summer to winter pelage: 
Head and sides of neck to shoulders dull fulvous brown; rest of upper 
parts dark steel gray; underparts ashy brown; tail sharply bicolor, 
dusky above, buffy below, becoming dusky toward tip. 
Cranial characters.—Skull small, decidedly smaller than in ragrans 
and as small as in californicus ; brain case moderately high—not at all 
flattened as in californicus ; rostrum rather small (about as in californi- 
cus); constriction swollen. Tooth row, as a whole, somewhat shorter 
than in californicus; unicuspids decidedly narrower, particularly the 
first and second; molariform series much as in californicus, but slightly 
smaller; large premolar very broad posteriorly. 
Measurements.—Type: Total length, 90; tail vertebra, 35; hind 
foot, 12. 
Remurks.—This new species is based on a single specimen caught by 
W. H. Osgood in a trap set in a springy place among the Shasta firs, 
immediately above Wagon Camp. In the same trap, and in the iden- 
tical spot, he caught also specimens of Veosorexr navigator and Neuro- 
trichus gibbsi major. Several specimens of Sorer vagrans amenus were 
caught near by, but no others of this species. 
Sorex shastensis is a small shrew of uncertain affinities. In several 
respects it resembles 8. californicus, but differs from this species mark- 
edly in color, and still more in the form of the cranium and narrow- 
ness of the unicuspidate teeth. 
Sorex vagrans amenus Merriam. Sierra Shrew. 
Twenty-two specimens of this small shrew were collected on Shasta 
and about its base. Two were caught among the tules at Big Spring, 
in Shasta Valley, on the north side of the mountain; two at Warm- 
castle Soda Springs, in Squaw Creek Valley, on the south side; and 
nineteen in the Canadian zone and lower part of the Hudsonian from 
Wagon Camp up to upper Squaw Creek, Mud Creek, and Ash Creek. 
Most of them were trapped under logs in damp places. 
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