202 The Mammals of Colorado 
Type locality. — Marvine Mountain, Rio Blanco County, Colorado. 
Measurements. — (Of type from Rhoads) : Total length, 28.25; 
tail vert., 8.25; hind foot, 3.0. 
Description. — Above brown, darkest on middle of back, paler on 
sides and somewhat fulvous; face, top of head, and chin a grayish 
brown; feet and legs dark brown; throat yellow and orange from 
chin to between fore legs (this varies much in individuals) ; belly 
palish brown, with orange between hind legs. 
FIG. 64. ROCKY MOUNTAIN MARTEN, Mustela caurina origenes 
Skull showing dentition, very slightly enlarged 
Skull somewhat arched above ; highest above middle of brain case ; 
postorbital constriction marked; rostrum short; zygomata high; 
palate extends one third distance from plane of last molars to 
bullae; last upper molar peculiarly saddle-shaped, its greatest 
dimension being the transverse one, the tooth being depressed in the 
middle and high on either side. 
Distribution. — The distribution of this Marten is given as the 
southern Rocky Mountain region, and we have at present no more 
definite information at hand. In Colorado it is probably found 
all through the heavy spruce forests of the main range, and those 
to the west. We have no information as to any records of its 
occurrence in the Pike's Peak Range. In some localities it is 
fairly common. 
