and dense forests. They can live wherever vegetable matter is to
e majority are terrestrial, passing much of their time on the surface
but retiring into burrows or underground runs. Their presence is
by the trails, tracks, runs, or burrows in or on the surface of the
trough the herbage. A few species are almost entirely subterranean
e of life, some are amphibious, and one at least—Phenacomys
•ue)—lives for the most part in the branches of the Douglas pine;
of four of the five species of- Vole
M. orcadensis . Af. amphibius Irf. agrcstis . E.glareolus
RANIUM.
19 n
' 19 12 11
Cephalic index . 73*68 73*07 63*15 64*70
Height. (1) Oblique
„ (2) Vertical 6 6
Oblique altitudinal it 60*52 6i *53 ~ 60*52
40*38 3X*57
Bistephanic diameter
Frontal length
. 21*05 42*33
Fronto-parietal length 14 20
Length . . *5 8
Breadth . . . | 6
Facial index • j 54*54
Pa l a t e .
Length . . - . 14*5
Breadth . . . 3
Palatine index . j 20*68
Cranio-facial length , . 27
Upper cranio-facial index . ! 127*27
Lower „ .,, . | 40*74
Eagle Clarke, Oh the Vole ami Shrem of the Orkney /
Scot. Nat. Hist. 1905, pp. 1-8).
4a/.