. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean . kened, and with long coarse hairs. Above, brown and pale yellowish gray, much lighter than mouse color. Outside of earsand flanks, pale yellowish brown, without any rufous. Beneath, dull whitish. A specimen was collected in the Rocky mountains, in the parallel of 39°. ARVICOLA MODESTA, Baird. Arvicola modesta, Baird, Gen. Rep. Mammals, 1857, 535. Sp. Ch.—Size of A. pinctorum, or larger. Ears moderate, well furred, rather shorter than the
. Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean . kened, and with long coarse hairs. Above, brown and pale yellowish gray, much lighter than mouse color. Outside of earsand flanks, pale yellowish brown, without any rufous. Beneath, dull whitish. A specimen was collected in the Rocky mountains, in the parallel of 39°. ARVICOLA MODESTA, Baird. Arvicola modesta, Baird, Gen. Rep. Mammals, 1857, 535. Sp. Ch.—Size of A. pinctorum, or larger. Ears moderate, well furred, rather shorter than the large fore feet, (. 35 to . 40 )Tail vertebrje scarcely longer than the head, (. 9:) with the hairs, one-third the head and body. Fur long, soft, . 4 of an , almost black, hairs with faint yellowish brown tip. Beneath, hoary plumbeous, the line of separation not verydistinct. Tail like the corresponding regions of the body. Feet dark brown. Middle upper molar with five triangles, although the indentations between the two last do not quite meet. Two specimens were collected in the SawatchPass, (Nos, 16 & 17.) 2 a Main-rii:-, P!h1-- r,^. ^»s. ■I 1
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