viii 



PREFACE. 



each other would be a very great undertaking and cannot be prop- 

 erly attempted at this time. Much additional knowledge, and in 

 many cases a greater amount of material must be acquired before 

 any considerable success in accurately determining the proper 

 status of the numerously named forms can be obtained. 



The following is the arrangement adopted for the Orders and 

 Families of the Mammalia comprised in this work, beginning with 

 the lowest in degree: 



VOLUME IV. PART I. 

 ORDER I. MARSUPIALIA MARSUPIALS. 



Fam. i. Didelphyidae Opossums. 

 ORDER II. EDENTATA EDENTATES. 



Fam. i. Bradypodidae Sloths. 



Fam. 2. Myrmecophagidae Ant-eaters. 



Fam. 3. Dasypodidae Armadillos. 



ORDER III. SlRENIA SlRENIANS. 



Fam. i. Trichechidae Manatees. 

 ORDER IV. CETACEA CETACEANS. 



Fam. i. Balaenidae Baleen Whales. 



Fam. 2. Physeteridae Sperm Whales. 



Fam. 3. Delphinidae Dolphins, Porpoises, etc. 

 ORDER V. UNGULATA HOOFED QUADRUPEDS. 



Fam. i. Tagassuidae Peccaries. 



Fam. 2. Cervidae Deer. 



Fam. 3. Antilocapridae Prong-horn Antelopes. 



Fam. 4. Bovidae Cattle, Sheep, etc. 



Fam. 5. Tapiridae Tapirs. 

 ORDER VI. RODENTIA RODENTS. 



Fam. i. Sciuridae Squirrels. 



Fam. 2. Castoridae Beavers. 



Fam. 3. Muridae Rats, Mice, Voles. 



Fam. 4. Geomyidae Pouched Rats. 



Fam. 5. Heteromyidae Kangaroo Rats, Pocket Mice. 



Fam. 6. Octodontidae The Octodonts. 



Fam. 7. Erethizontidae Porcupines. 



Fam. 8. Agoutidae Agoutis, Pacas. 



Fam. 9. Leporidae Hares, Rabbits. 



VOLUME IV. PART II. 

 ORDER VII. CARNIVORA CARNIVORES. 



Fam. i. Felidae Cats. 



Fam. 2. Viverridae Mungoose, Civets, etc. 



Fam. 3. Canidae Dogs, Wolves, Foxes. 



Fam. 4. Ursidae Bears. 



Fam. 5. Procyonidae Raccoons. 



Fam. 6. Mustelidae Badgers, Weasels, Otters, etc. 

 ORDER VIII. PINNIPEDIA PINNIPEDS. 



Fam. i. Otariidae Sea-lions. 



Fam. 2. Phocidae Seals. 



