List of Illustrations 
FACING PAGE 
weaver Lodges and a Dam : 
A Pair of Woodchucks by their merow 4 se iis monax ) 
Woodchuck (Arctomys monax) 
Prairie Dogs (Cynomys ludovicianus ) ; ‘ ‘ 
Western Spermophile ( a Age ain in 
Colorado : 2 ; ‘ 
Say’s Spermophile ( Sieraapiis iieraliey 
White-tailed Spermophile (Spermophilus leucurus ) 
Young of Columbia Spermophile (Spermophilus columbianus ) 
Say’s Spermophile in Snow (Spermophilus lateralis) 
Young Prairie Dog (Cynomys ludovicianus), about one-third 
grown 
Western Chipmunk ( Tamias Aa aah eeranis) 
Chipmunk (Tamias striatus) 
Gray Squirrel (Sciurus carolinensis) . 
Red Squirrels (Sciturus hudsonicus gymnicus) 
Young Red Squirrel (Sciurus hudsonicus gymnicus ) 
Hoary Marmot (Arctomys Pruinosus) 
Pine Squirrel (Sciurus hudsonicus richardsont) 
Flying Squirrel (Sciuropterus volans) 
Common Mole (Scalops aquaticus ) 
Star-nosed Mole (Condylura cristata) 
Marsh Shrew (Sorex palustris) 
Four Common Eastern Bats 
Sea-lion (Zalophus californianus) ; 
Sea-lion (Zalophus californianus), barking 
Walrus Bulls and Cows (Odobenus rosmarus) . 
Fur Seals (Otoes alascanus) 
Harbor Seals (Phoca vitulina) 
Otter (Lutra canadensis) : . 
Skunk (Mephitis putida), crossing a stream 
Mink (Putorius vison) 
Weasel (Putorius noveboracensis ) P 
American Sable or Pine Marten (Mustela americana). 
Wolverine or Carcajou (Gulo luscus) ; ° ° 
xi 
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