92 NEW- YORK FAUNA. 



"' WITH CHEEK POUCHES. 



Genus Geomys, Richardson. Eyes small and far apart ; auditory hole small, with a slightly raised 

 margin ; molars ten above, ten beneath ; cheek pouches large and pendulous, opening into the 

 mouth by the side of the molar teeth. Burrowing. 

 G. douglasi. (Richardson, pi. 18.) Dusky brown above, paler beneath. Tail more than half the 



length of the body. Length nine inches. Columbia River. 

 G. umbrinus. (Id. p. 202.) Umber brown above, grey beneath; throat and feet white. Tail grey, 



hairy, as long as the head. Length 9 inches. Louisiana. 

 G. talpoides. (Id. p. 204.) Greyish black; chin, throat and tail white; hind feet with but four com- 

 plete toes. Length nine inches. Hudson! s Bay. 

 G. bulbivorus. (Id. pi. 18, b.) Mouth vertical; a wide pouch on each side, not communicating with 



the cavity of the mouth. Length 14 inches. Columbia River. 

 G. bursarius. (Sav, Long's Exped. Vol. 1, p. 406. Shaw, pi. 138.) Reddish b^o^TO or greyish ; 



upper incisors with a deep groove in the middle. Length 9 to 12 inches. Upper Lakes, Missouri, 



Florida. 

 G. borealis. (Bachman, Ac. Sc. Vol. 8, p. 103.) Pale grey; beneath with feet and tail, white; upper 



incisors scarcely grooved ; ears distinct, not concealed. Length 9^ inches. Columbia River. 

 G. tawnsendi. (Id. ib. Vol. 8, p. 105.) Colored as in the preceding; chin pure white; closely allied 



to the preceding. Length 10 inches. Columbia River. 



FAMILY VII. LEPORID^. 



Body covered with hair alone. Clavicles rudimentary. Ears long and erect. Eyes large 

 and prominent. Head long, narrow and compressed. Four upper incisors, {in the young 

 six.) Anterior feet with Jive toes, posterior with four. Tail short, or none. Timid, 

 saving itself by rapid flight. 



GENUS LEPUS. Linneus. 



Incisors above, four ; the two in front large, and grooved ; the two behind, small. Molars 



twelve above, ten beneath, cylindrical^ compressed, and composed of two vertical soldered 



folds of enamel. Interior of the mouth, and the soles of the feet, furnished with hair. 



Tail short and upturned. Hind legs very long. Mamma six to ten in number. A fold 



of skin in each groin, forming a sort of pouch. 



