List of Illustrations 



FACING rXGR 



Young Woodland Caribou (Rangifer caribou) ... 54 



Typical Heads and Antlers of Cervidae .... 56 



Pronghorn (Antilocapra americana) ..... 58 



Young Pronghorns (Antilocapra americana) . . 60 



Pronghorns (Antilocapra americana) ... . 62 



Male Pronghorns (Antilocapra americana) ... 64 



Mountain Goat (Oreamnos montanus) .... 66 

 Young Cow Musk Ox, about 16 months old (Ovibos mos- 



chatus) 68 



Bull Bison (Bison bison) . . . . . - . 70 



A Herd of American Bison (Bison bison) . 72 



Nest of Young Cottontails ....... 76 



Young Cottontail Among the Cabbages (Lepus floridanus 



mallurus) 76 



Varying Hare (Lepus americanus "virginianus) . . 86 



Little Chief Hare, or Pika (Ochotona princeps) . . 92 

 Canada Porcupine (Erethi^on dorsatus), with quills thrown 



forward. In wild state ." . ... . 94 

 American Porcupine Swimming, with quills projecting (Ere- 



thi^on dorsatus) . . . . ' l . . 96 



Western Pocket Gopher (Thomomys) . . . . 98 

 Western Long -tail Mouse, caught in the Bitter Root 



Mountains . *, : ' 102 



Long-tailed Jumping Mouse (Zapus hudsonius) v ' * 102 



Mice and Shrews of the Eastern States . . . no 



Western and Southern Mice and Rats - . . .. 114 



Muskrat (Fiber %ibethicus) ...... 122 



Western Wood Rat, female (Neotoma) . . . . 128 



Cotton Rat (Sigmodon hispidus littoralis) . , . 130 



Western Bushy-tailed Wood Rat (Neotoma) . . 130 



White-footed Mouse (Peromyscus), enlarged . . . 132 



White-footed Mouse and Young (Peromyscus leucopus) . 134 



House Mouse on Trap (Mus musculus) . v . . 142 



Common, or Norway Rat (Mus norvegicus) -, . , . 142 



Canadian Beaver (Castor canadensis) --, . . . 146 



