CONTENTS 



PAGE 



Preface iii 



Contents v 



Prologue vii 



Introduction 1 



Classification 4 



Early records and migrations of the common rats 7 



ALBINO RAT— MUS NORVEGICUS ALBINUS 

 PART I 



Chapter 1. Biology 15 



Chapter 2. Genetics 34 



Chapter 3. Anatomy 37 



Chapter 4. Physiology 132 



Chapter 5. Growth in total body weight according to age 172 



Chapter 6. Growth of parts or systems of the body in weight 181 



Chapter 7. Growth of parts and organs in relation to body length and in 



relation to age 201 



Chapter 8. Growth in terms of water and solids 299 



Chapter 9. Growth of chemical constituents 312 



Chapter 10. Pathology 327 



NORWAY RAT— MUS NORVEGICUS 

 PART II 



Chapter 11. Life historj^ and distinguishing characters 335 



Chapter 12. Growth in total body weight on age — caged Norways 342 



Chapter 13. Growth in total body weight on body length 346 



Chapter 14. Growth of organs in relation to body length 358 



Chapter 15. Growth in terms of water and solids 378 



Chapter 16. Captivity and domestication 382 



Chapter 17. References to the literature 387 



Index 459 



