CONTENTS XI 



CHAPTER PAGE 



XVI. THE VERTEBRATES . .417 



Fishes 419 



Amphibians . . . 424 



Reptiles 426 



Birds 429 



Mammals .......... 436 



Life-Histories of Vertebrates 442 



PART IV 



PRINCIPLES OF BIOLOGY APPLIED TO HUMAN 

 STRUCTURE AND LIFE 



INTRODUCTION. HUMAN BIOLOGY AND CLASSIFICATION OF MAN . 466 

 XVII. HUMAN STRUCTURE AND LIFE-ACTIVITIES . . . 467 



XVIII. BIOLOGY APPLIED TO HEALTHFUL LIVING . . . 525 

 Personal Hygiene ........ 625 



Effects of Stimulants and Narcotics . . . .539 



Bacteriology applied to Human Health .... 554 



PART V 

 XIX. EVOLUTION AND HEREDITY OF ANIMALS AND PLANTS 661 



