INTRODUCTION. XXXI 
Arctomys empetra. 
= > pruinosus. 
‘as (Spermophilus) Parryi, var. erythrogluteia. 
a5 os a pheognatha. 
By Be guttatus ? 
“3 > lateralis. 
Sciurus (Tamias) quadrivitiatus. 
>> Hudsonius. 
Pteromys Sabrinus, var. alpina. 
Hystrix pilosus. 
Lepus Americanus. 
»  glacialis. 
Lepus (Lagomys) princeps. 
Cervus alces. 
f (Aflarge kind of caribou is saidjto frequent the moun- 
” tarandus? tains, but I have seen no specimens either of the animal 
lor of its horns.) 
<5)  Mmacrotis. 
Capra Americana (on the highest ridges.) 
Ovis montana (on the eastern side of the ridge.) 
Bos Americanus (in particular passes only.) 
The country lying between the Rocky Mountains and the Pacific 
is in general more hilly than that to the eastward ; but there are some 
wide plains on the upper arms of the Columbia which have much of 
the character of the plains of the Missouri and Saskatchewan, and are 
inhabited by the same kind of animals. In particular the ursus ferox, 
canis latrans, canis cinereo-argentatus, the braro (perhaps meles Labra- 
doria), cervus macrotis var. . Columbiana, cervus leucurus, and 
aplodontia leporina, are enumerated by Lewis and Clark. Mr. 
Douglas also observed the condylura macroura, and several species of 
Felis and of Geomys and Diplostoma in that quarter. The sea-coast 
at the mouth of the Columbia is frequented by a species of fox very 
like the European one, or the red-fox of the Atlantic states of America. 
The Arctomys brachyurus and the Arctomys Douglasii also inhabit 
the banks of the Columbia; and the Arctomys Beecheyi, a species 
nearly allied to the latter, is found in the adjoining parts of California. 
The bison are supposed to have found their way across the mountains 
only very recently, and they are still comparatively few in numbers, 
and confined to certain spots. | 
