176 - NORTHERN ZOOLOGY. 
times tinged with brown. The cheeks, sides of the neck, and exterior parts of the fore and 
hind extremities, have more or less of a chestnut-brown hue. The crown of the head is 
brown, mixed with a little gray, and is darker on the mesial line. ‘The ears are brown on the 
margins, but pale elsewhere. There is a white circle round the eye. The nose and forehead 
are pale yellowish-brown, and the upper lip and chin are nearly white. 
The tail is depressed or distichous, nearly linear, being only very slightly broader towards 
the tip. Itis black above, with an intermixture of brownish-white hairs, and is bordered 
with the latter colour ; yellowish-brown beneath, and margined with black and brownish- white. 
The feet are shaped like those of the four preceding spermophiles. The claws are much 
longer and better fitted for digging than those of the Sciwrus Lysteri or quadrivittatus. 
The thumb-tubercle is far back, and has a small, obtuse nail. The hind soles are naked to 
the heel, as are also the palms, and under surface of the toes. The upper surfaces of the feet 
are covered with short, yellowish-white hairs, which scarcely reach beyond the roots of the 
black claws. 
DIMENsiIons 
Of prepared skins. 
Inches. Lines. Inches. Lines. 
Length of body and head, from 7 9 to 8 6 
Inches. Lines. 
Length of palm and middle fore-claw . - 0 11 
55 head alone . ‘ 2 2 =A hind-sole and middle-claw : 1 6 
% nose to auditory opening » 2 & 59 hind middle-claw . - O 24 
oF) tail (vertebra) . : : 2 9 Height of ear . ° . ° 0 4 
x >> including fur , . 3 9 Breadth of base of external ear 0 5 
> middle fore-claw 0 4} 
