4 CoNntTENTS 
OrDER UncuLATA. Hoorrep MAMMALS . 
Family Cervide. Deer, Moose, Elk, Caribou 
Key to the Genera . 
Key to the Species . 
Family Bovide. Bison, Oxen, Sheep, etc. 
OrpER GLIREs. GNAwiInGc MAMMALS 
Key to the Suborders and Families . 
Family Sciuridee. Squirrels, Woodchucks, etc. 
Key to the Genera 
Key to the Species . 
Subfamily Pteromyine. Flying Squirrels 
Subfamily Sciurine. Squirrels, Chipmunks, etc. : 
Subfamily Marmotine. Prairie Squirrels, Woodchucks, etc. 
Family Castoride. Beavers 
Family Muride. Rats and Mice 
Key to the Genera 
Key to the Species 
Subfamily Murine. Old World Rats and Mice 
Subfamily Cricetine. White-footed Mice, Cotton Mice, ae 
Key to the Species 
Subfamily Neotominz. Wood Rats 
Subfamily Microtine. Meadow Mice or Votes, ementae 
Mice, and Muskrats . : 
Key to the Subgenera and Species ae AMicrotus 
Family Geomyide. Pocket Gophers 
Family Zapodide. Jumping Mice 
Subfamily Zapodine. American Jumping Mice 
Family Erethizontide. American Porcupines ; > 
Subfamily Erethizontine. American Porcupines 
Family Leporide. Hares and Rabbits 
Key to the Genera 
Key to the Species 
ORDER Frr@. FLresu EATErs 
Key to the Families 
Family Felide. The Cats . 
Subfamily Feline. Panthers, Lynx, Wild Cat, etc. 
Key to the Genera 
Key to the Species . 
Family Canide. Wolves and Foxes 
Key to the Genera . 
Key to the Species . 
Family Mustelide. Otters, fviitites Weasels, Sicinies Badgers, es 
