List of Illustrations 



FACING PAGB 



Young Woodland Caribou (Rangifer caribou) ... 54 



Typical Heads and Antlers of Cervidae .... 56 



Pronghorn ( Aniilocapra 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 (Lepns floridanus 



mall urns) 76 



Varying Hare (Lepns americanns virginianus) . . 86 



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



Canada Porcupine (Erethi\pn dorsatus), with quills thrown 



forward. In wild state 94 



American Porcupine Swimming, with quills projecting (Ere- 



thi^on dor sat ns) ....... 96 



Western Pocket Gopher (Thomomys) .... 98 



Western Long -tail Mouse, caught in the Bitter Root 



Mountains 102 



Long-tailed Jumping Mouse (Zapns hudsonins) . . 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 hispidns littoral is) . . . 130 



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



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



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



House Mouse on Trap (Mns musculus) .... 142 



Common, or Norway Rat (Mns norvegicns) . . . 142 



Canadian Beaver (Castor canaJensis) . . . . 146 



