ONYCHOMYS. 



Sub. Fain. 11. Cricetinae. 

 45. Oiiychoiiiys. 



I. '—' : M. ^^ = i6. 



i-i 3-3 



Onychomys. Baini, N. Am. Mamm., 1857, p. 458. Type //. Uiko- 

 gasier. Max. 



HypudiBiis, Max. Reise, N. Am., 1841, 11, p. 99. (nee Auct). 



"Form arvicoline; tail less than half the body in length; claws 

 \ery large, fossorial, the anterior longest. Soles with only four 

 tubercles, the two posterior of the other groups wanting: the pos- 

 terior two-thirds of the soles densely furred. Skull without orbital 

 crest; the upper margin of orbit sharp." 



Fig. 29. Onychomys leucogaster. 



No. 1632 Field Columbian Museum Coll. Nat. size. 



Upper tooth row. 

 Enlarged 4 times. 



Lower tooth row. 

 Enlarged 4 times. 



152. leucogaster. {.Hypudiens), Wied., Reis. N. Am., 1841.V0I. 11, 

 p. 99. 



missouriensis, Aud. & Bach. Quad., 11, 1851, p. 327, pi. 100. 



Type locality. Fort Clark, Dakota. 



Geogr. Distr. Dakota, Missouri, Nebraska, Kansas, Oklahoma, 

 Indian Territory and Texas. 



Genl. Char. Fore feet very strong, hind ones smaller; tail short, 

 thick at base, tapering rapidly to a point, and covered with short 

 hairs. 



