60 NEW SPECIES OF AMERICAN QUADRUPEDS. 
know to be young animals have similar dental 
arrangements. 
2. Arvicola Townsendii. Townsend’s Meadow 
Mouse. 
Body cylindrical; head rather small; whiskers 
nearly all white, intermingled with a few black 
hairs ; eyes small ; teeth large, yellow ; ears large, 
broad, extending a little beyond the fur ; feet of 
moderate size; toes like the rest of this genus; 
thumb protected by a rather short, acute nail; 
fur on the back about three lines long, much shorter 
beneath; tail scaly, sparingly covered with soft, 
brown hair, a few white hairs at its extremity ; feet 
clothed to the nails with short, brown, adpressed 
hairs ; claws brown ; fur above lead color from the 
roots to near the tips, which are dark brown ; be- 
neath cinereous. 
Length of head and body, 
“ tail, 
F ore feet to point of nails, 
From heel to point of nail, 
Breadth of ear, 
Of this species, which was a male, obtained by 
Mr. Townsend on the Columbia river, on the 21st 
July, 1835, 1 can find no description in Richardson. 
6 inches 0 lines. 
2 “ 6 “ 
0 “ 9 u 
1 “ 0 “ 
0 “ 5 “ 
3. Arvicola oregoni. The Oregon Meadow Mouse. 
This diminutive species is another of the disco- 
veries of Mr. Townsend. 
