CONTENTS 



Introduction . . . . . 



What is a Mammal? . . . . 

 How TO Use This Field Book 

 Opossums (Family Didelphiidse) 

 Moles (Family Talpidas) . 

 Shrews (Family Soricidsej 

 Leaf-nosed Bats (Family Phyllostomidae) 

 Bats (Family Vespertilionidai) . 

 Free-tailed Bats (Family Molossidas) 

 Bears (Family Ursidce) . 

 Raccoons (Family Procyonidae) 

 Cacomistles (Family Bassariscidaj) . 



Martens, Weasels, and Minks (Subfamily Mustelinaj) ■ 92 

 Wolverines (Subfamily Gulonince) . . . .111 



Otters (Subfamily Lutrinae) . . . . .114 



vSea Otters (Subfamily Enhydrinae) . . .118 



Skunks (Subfamily Alephitinae) . . . .120 



Badgers (Subfamily Taxidiinas) . . . -134 



Foxes, Coyotes, and Wolves (Family Canidae) . 137 



Cats (Family Felidse) . . . . . -157 



Eared Seals (Family Otariidae) . . ■ . .170 



Hair Seals (Family Phocidag) . . . .173 



Walruses (Family Odobenidae) . . . .180 



WooDCHUCKs, Ground Squirrels, Prairie-dogs, 

 Chipmunks, and Tree Squirrels (Subfamily 

 Sciurinas) ........ 183 



Flying Squirrels (Subfamily Pteromyinae) . . 260 



Pocket Gophers (Family Geomyidae) . . . 269 



Pocket Rats and Pocket Mice (Family Heteromyidee) 297 



xxi 



111 



xi 



xvi 



4 

 8 



25 

 47 

 49 

 69 



74 

 86 

 90 



