NEW AMERICAN QUADRUPEDS. 
103 
Breadth between the outer edges 
of the dying membrane, 8 inches 0 lines. 
Longest hind toe, including nail, 0 “ 5i 
Longest fore toe, including nail, 0 “ 5? 
From heel to point of nail, 1 
1 U U 
Nose to ear, 1 
Habits. — Mr. Townsend remarks, in regard to 
this species, that it inhabits the pine woods of the 
Columbia, near the sea; very rare. Habits of the 
P. volucella. 
Geomys borealis, (Richardson.) 
Pseudostoma borealis. Manuscript notes of Dr. Ri- 
chardson. 
Among the specimens brought by Mr. Town- 
send, were two differing considerably in size, which 
I find identical with one which had been procured 
on the Columbia river by Douglass, and which was 
in the possession of Dr. Richardson. As he is pre- 
paring a monograph of this perplexing genus, I 
should not have noticed the present and following 
species in this paper, were it not for the necessity 
I am under, of indicating the species of quadrupeds 
brought to the United States by Mr. Townsend. I 
have, therefore, adopted the names of Richardson, 
who will give more ample descriptions, and is fully 
entitled to the credit of having been the first to 
detect the species. 
General color pale gray, the upper parts more or 
less washed with yellow. Insides of pouches, the 
