CONTENTS. 5 



Family Dipodidse 217 



Genus Zapus 218 



Family Geomyidse 220 



Genus Geomys 222 



Family Leporidae (Hares) 230 



Family Hystricidse (Porcupines) 243 



Genus Erethizon 246 



Distribution of Rodentia 252 



CHAPTER VI. ORDER ARTIODACTYLA (HOOPED 



QUADRUPEDS) 254-290 



General account 254 



Family Bovidse Genus Bison 258 



Family Cervidse 270 



Alces americanus 270 



Rangifer tarandus 274 



Cervus canadensis 278 



Cervus (Cariacus) virginianus 281 



Antilocapra americana 282 



