304 
PSEUDOSTOMA CAS TAN O PS B aird. 
Chestnut-cheeked Pouched Rat. 
(In Stansbury’s Report of the Expedition to the Great Salt Lake, p. 313.) 
DESCRIPTION. 
General colour pale yellowish brown. There is an ample patch of light 
chestnut on the side of the head and face, deepest above. The dorsal line 
is not darker than the rest of the fur. Size intermediate between P. borea- 
lis and P. bursarius. 
COLOUR. 
The colour of the fur above is slightly grizzled, and much lighter than 
in P • bursarius beneath paler ; throat, space between the fore legs anti 
arms pale rusty. The chestnut marking on the side of the head is very 
strongly defined, occupying on each side a nearly circular space of about 
one and three quarter inches in diameter, with the ear as the centre. 
These chestnut spaces do not quite meet on the crown and occiput, but 
leave a rectilinear interval, coloured like the rest of the back, of about one- 
eighth of an inch in width. On the muzzle, however, from above the eyes 
the colour of the opposite sides is confluent. The hind feet and toes are 
thinly covered with whitish hairs, which on the fore feet appear more fer- 
ruginous. 
The claws are white, but sufficiently transparent to allow the coagu- 
lated blood to show through them. 
DIMENSIONS. 
Inches 
Length to base of tail (approximate), ... - 8 
“ of tail, 21 
“ “ hand (along the palm), 1A 
“ “ middle anterior claw, r ^ 
“ “ hind feet (along sole) from heel, - - - It 
