. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. a. b. c. Pig. 125.—Microtus califoknicus. Skvll. a, doesal view, 6, ventral view; c, lateral view. Description.—Size, large; mammae, P.|, A§, =4 pairs; skull (fig. 125) massive with rostral portion short and depressed; teeth as shown in fig. 126; coloration similar to Microtus edax; pelage full, long, and rather soft; plantar
. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. a. b. c. Pig. 125.—Microtus califoknicus. Skvll. a, doesal view, 6, ventral view; c, lateral view. Description.—Size, large; mammae, P.|, A§, =4 pairs; skull (fig. 125) massive with rostral portion short and depressed; teeth as shown in fig. 126; coloration similar to Microtus edax; pelage full, long, and rather soft; plantar tubercles, 6. Color.—Upper parts bistre enLvened by tawny and black hairs, shading to grayish drab on sides and rump; under parts plumbeous, overlaid by hoary tips to the hairs; tail not distinctly bicolor, but dusky above and gray- ish below; feet smoke gray; whiskers mixed brown and white or colorless; head without white or yellowish markings. Measurements.—(Adult male,- Cat. No. 60954 , from Tecate Kiver, near Tecate Mountain, northern Lower California, June 26 1894; collected by the author).—Total length 192 mm.; tail vertebrae, 59; terminal pencil, hind foot, 24; ear, from crown, Skull greatest length, 30; zygomatic breadth, mastoid breadth, 14; length of nasals, alveolar length of upper tooth row, Habits.—When we made our camp on the Tecate River at the foot of Tecate Mountain, in northern Lower California, June 24, 1894, we immediately discovered numerous runways of this, the only species of vole collected on the oElliot has described a subspecies hyperyihrus (in Field Col. Mus., Zool. Ser., Ill, 1903, p. 161; also in Land and Sea Mammals of Middle America and the West Indies, Zool. Ser. IV, 1904, pp. 300-303, fig. "51" [skull and teeth], fig. "xlv" [animal]), from San Quen- tin. Lower CaUfomia. Fig. 126.—Microtus califoe- Nicus. Crowns of molar TEETH, a, UPPER SERIES) ft, lower Please note that
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