Xvi CONTENTS 



Page 



Order 4. Testudinata (Turtles) 225 



Habits and distribution 226 



On the identification of turtles 227 



Key to the fanailies of Testudinata 227 



Family i. Kinosternidae (Mud turtles; musk turtles) 227 



Family 2. Chelydridae (Snapping turtles) 229 



Family 3. Testudinidse (Pond turtles; land turtles) 230 



Family 4. Trionychidae (Soft-shell turtles) 239 



Family 5. Cheloniidse (Marine turtles) 241 



Family 6. Demochelidae (Marine turtles) 242 



CLASS 5. MAMM.\LS 243 



On the identification of mammals 243 



History 245 



Key to the orders of mammals in the United States 245 



Order i. Marsupialia 245 



Suborder Polyprotodontia 246 



Family Didelphiidae (Opossums) 246 



Order 2. Edentata 247 



Family Dasypodidae (Armadillos) 247 



Order 3. Sirenia 247 



Family Trichechidse (Manatees) 247 



Order 4. Insectivora 247 



Family i. Talpidaj (Moles) 248 



Family 2. Soricidae (Shrews) 252 



Order 5. Chiroptera (Bats) 257 



Suborder Microchiroptera 257 



Family i. Phyllostomidae 258 



Family 2. Vespertilionidae 258 



Family 3. Molossidas 264 



Order 6. Carnivora 264 



Family i. Ursidae (Bears) 264 



Family 2. Canidae (Dogs; wolves; foxes) 266 



Family 3. Procyonidae (Racoons) 270 



Family 4. Bassariscidae (Cacomistles) 271 



Family 5. Mustelidae 272 



Subfamily I. Mustelinae (Weasels; minks) 272 



Subfamily 2. Guloninae (Wolverines) 278 



Subfamily 3. Mephitinae (Skunks) 278 



Subfamily 4. Taxidiinae (Badgers) 283 



Subfamily 5. Lutrinae (Otters) 283 



Subfamily 6. Enhydrinae (Sea otters) 284 



Family 6. Felidas (Cats) 284 



Order 7. Pinnipedia (Seals) 288 



Family i. Otariidae 288 



Family 2. Phocidae 288 



Order 8. Rodentia (Rodents) 289 



Family i. Muridae (Rats; mice) 290 



Subfamily I. Murinae (House rats and mice) 290 



Subfamily 2. Cricetinae (Field mice; wood mice) 291 



Subfamily 3. Neotominae (Wood rats) 301 



Subfamily 4. Microtinae (Meadow mice; muskrats) 304 



Family 2. Geo myidae (Pocket gophers) 3^4 



Family 3. He tero myidae (Pocket mice; kangaroo rats) 319 



