1852.] 201 



Color. IncisorB 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-lOths. 

 " " of tail vertebra - - - - 3 7-lOths. 

 " " of ear anterior , - - - 3-lOths. 

 " ' of whiskers - - - - l 7-lOths. 



" " OS calcis, middle toe nail - - 1. 

 Distance from anterior angle of orbit to tip of nose 6^-10th3. 



Habitat. New Mexico, west of Rio Grande. 



Ohs. Of the habits of this animal I know but little. The specimen in my 

 possession is a male, and was procured in the San Francisco Mountain, New 

 Mexico. 



Description of a New Species of Pouched Rat of the Genus Geomys, Raf. 



By S. W. WooDHOusE, M. D. 



Geomys fulvus. 



Characters. Light reddish brown above, beneath whitish. Ears small, 

 round, and covered with thick short black fur. Tail long 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 (fonvex 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 thomb resembles much the claw of the 

 fourth toe of the hind foot, both as regards size and shape. The 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 ; for 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 small 

 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. 



