TJ. S. P. R. R. EXP. AND SURVEYS ZOOLOGY GENERAL REPORT. 



comparison with that of the body. The cheek pouches are unusually small, which may, how 

 ever, be owing in some measure to contraction in alcohol. The specimen was received whole in 

 spirits, with the pouches everted. 



The head is broad and large ; the whiskers very short and grayish white ; the ear margin 

 quite distinct ; the tail, nearly half the length of the body, everywhere completely covered with 

 hair, except at the extreme and blunt point. The fur is rather soft, and full everywhere. The 

 cheek pouches are small ; densely coated everywhere with short, close, velvety hair. 



As remarked above, the feet are unusually powerful, the claws particularly so ; on the hands 

 these are much curved, compressed and high, though not very long ; the general proportions 

 are not dissimilar to the Steilacoom species, though here the feet are actually larger ; the middle 

 claw, measured below, occupies about one-third the length of the whole hand, (with the claw,) 

 or is nearly half the length of the palm and fingers ; its finger, again, is nearly of this same 

 length, and slightly shorter than the palm proper. The thumb is very small, reaching barely 

 over two-fifths of the whole hand. The second finger is longer than the fourth ; the fifth claw 

 does not quite extend to the end of the bulb of the fourth finger. The hind feet are very broad, 

 the first and second claws reaching further, respectively, than the fifth and fourth. 



The incisors are yellow, nearly flat in front, or with but slight convexity in the cross sections. 

 There is a distinct raised margin to the inner edge of the upper ones, though scarcely an incised 

 furrow ; they are also large in proportion to the rest of the skull. 



The entire upper parts are of a pale grayish yellow brown, with a gloss of darker along the 

 middle of the back, the tips of the hairs scarcely darker. The under parts generally, the entire 

 fore legs, the hind feet, tail, and inside of the cheek pouches, are yellowish white with a faint 

 tinge of reddish, particularly on the edge of the belly and outside of the fore legs. The base 

 of the tail above has a slight point running on it like the back. There is a dusky spot around 

 and behind the ear. 



The specimen of this species described above was collected somewhere in the vicinity of Fort 

 Pierre, Nebraska, in the summer of 1853, by Dr. John Evans, and preserved in alcohol. The 

 measurements of body, head, and tail, were taken before skinning. 



Measurements of 610. 



