1852.) 201 
Color. Incisors yellow, top of head and back dark yellowish brown, lighter 
on the sides; fur at base light ash color. Throat, belly, vent, fore legs and 
inner portions of thighs white. The white commences at the nostrils, and 
forms a well marked line to the thighs, and extending down to the heel, leaving 
the front of thigh white, the remainder and outer portion light yellowish brown ; 
feet white. Under portion of tail white, above dark brown; the long hair of 
the tail is a rich brown. 
Inches. 
Dimensions. Total length from tip of nose to root of tail - 3 5-10ths. 
< 66 of tail vertebra - - - - 3 7-10ths. 
3 6< of ear anterior - - - - 3-10ths. 
66 ‘¢ of whiskers - : - - 1.7-10ths. 
66 os calcis, middle toe nail - an 
Distance from anterior angle of orbit to tip of nase 64-10ths. 
Halitat. New Mexico, west of Rio Grande. 
Obs. Of the habits of this animal I know but little. The specimen in my 
possession is a male, and wag procured in the San Francisco Mountain, New 
Mexico. 
Description of a New Species of Pouched Rat of the Genus Geomys, Raf. 
By S. W. Woonuovusg, M.D. 
GEOMYS FULVUS. 
Characters. Light reddish brown above, beneath whitish. Ears small, 
round and covered with thick short black fur. Tail Jong in proportion when 
compared with others of this genus. 
Description. Head large, nose broad, covered with short thick fur, with the 
exception of a small space at tip and the margins of the nostrils, which are 
naked. The nose extends a short distance beyond the plane of the incisors. 
The incisors are exserted, with three convex smooth sides, the exterior broadest, 
and of a yellowish color; their cutting edges are even. The upper incisors 
extend downwards and inwards; the under ones are one-third longer than the 
upper, and slightly narrower. Ears small and round, covered with short thick 
black fur externally. Eyes larger than is common in this genus. Tail round, 
thick at base, and gradually tapering. The fore claws are long, compressed, 
slightly curved and pointed. The claw on the middle toe is the longest, the 
fifth is the shortest, and that of the thumb resembles much the claw of the 
fourth toe of the hind foot, both as regards size and shape. ‘lhe toes on the 
hind feet are a little longer and more slender than those of the fore feet; the 
nails short, somewhat conical and excavated underneath. 
Color. Head, cheeks, back and sides bright reddish brown, being darker on 
the top of the head and back. ‘The breast, vent, feet, inner portion of legs and 
thighs white, slightly inclining to ash; abdomen very light reddish brown; fur at 
base dark ash color above, beneath light ash. Edges of cheek pouches encircled 
with rufous; the long hair of the back extends about one third the length of the 
tail. The tail is covered with short white silky hairs, terminating in a smal] 
tuft. The fore feet above are covered with short. white hair; the toes on their 
inner side have a row of long white hairs; palms naked. Claws are opaque, 
white for half their extent, the other half transparent; there is a small oblong 
reddish brown spot in the centre of each. The hind feet are covered above 
with white hairs, soles naked. The lips, on their inner side, are covered with 
short fine white hair, with a band of short fine black fur encircling the mouth. 
Whiskers silvery white. 
