CONTENTS 



Class VI. Mammalia, 311. — Order I. Monotremata, 319. — 

 Order II. Marsupialia, 320.— Order III. Edentata, 323.— Order 

 IV. Sirenia, 325.— Order V. Cetacea, 326.— Order VI. Ungulata, 

 329.— Order VII. Rodentia or Glires, 350.— Order VIII. Car- 

 nivora, 356. — Order IX. Insectivora, 366. — Order X. Chirop- 

 tera, 368— Order XI. Primates, 372. 



Theories of Development 382 



Questions, Problems, and Suggestions 394 



Glossary 413 



Index 417 



