CONTENTS XVU 



Page 



Family 4. Zapodidae (Jumping mice) 324 



Family 5. Erethizontidae (Porcupines) 325 



Family 6. Aplodontiidte (Mountain beavers) 326 



Family 7. Sciuridae (Squirrels; marmots) 326 



Subfamily i. Sciurinae 327 



Subfamily 2. Pteromyinae 343 



Family 8. Castoridas (Beavers) 344 



Family 9. Leporidae (Rabbits; hares) 345 



Family 10. Ochotonida; (Pikas) 351 



Order 9. Ungulata (Hoofed animals) 352 



Suborder Artiodactyla 352 



Division i. Suina (Pigs) 353 



Family Tayassuidae (Peccaries) 353 



Division 2. Ruminantia 353 



Subdivision i. Cervina (Deer) 353 



Family Cervidae 353 



Subdivision 2. Cavicornia 357 



Family i. Antilocapridac (Prong-horn antelopes) . 357 



Family 2. Bovidae (Cattle; sheep; goats) 358 



BIBLIOGRAPHY 361 



LIST OF AUTHORS 367 



GLOSSARY 375 



INDEX 385 



