92 NEW-YORK FAUNA. 
** WITH CHEEK POUCHES. 
Genus Gromys, 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. (Ricwarpson, pl. 18.) Dusky brown above, paler beneath. Tail more than half the 
length of the body. Length nine inches. Columbia River. 
G. umbrinus. (Ip. p. 202.) Umber brown above, grey beneath; throat and feet white. T'ail grey, 
hairy, as long as the head. Length 9 inches. Lowisiana. 
G. talpoides. (In. 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. (Ip. pl. 18, 8.) Mouth vertical; a wide pouch on each side, not communicating with 
the cavity of the mouth. Length 14 inches. Columbia River. 
G. bursarius. (Say, Long’s Exped. Vol. 1, p. 406. Saw, pl. 138.) Reddish brown or greyish ; 
upper incisors with a deep groove in the middle. Length 9 to 12 inches. Upper Lakes, Missouri, 
Florida. : 
G. borealis. (Bacuman, Ac. Sc. Vol. 8, p. 103.) Pale grey; beneath with feet and tail, white; upper 
incisors scarcely grooved; ears distinct, not concealed. Length 93 inches. Columbia River. 
G. townsendi. (Ip. 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. LEPORIDA. 
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 
sia.) Anterior feet with five 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. Mamme six to ten in number. A fold 
of skin in each groin, forming a sort of pouch. 
