CONTENTS 



PART I 



THE PARTS OF ANIMALS AND HOW THEY ARE USED 



CHAPTER PAGE 



I. THE GRASSHOPPER AND THE SNAIL (External Structure) . 1 

 II. THE SUNFISH AND THE SP ARROW (External Structure) . 8 



III. THE GARDEN TOAD (Euro LENTIGINOSUS) (External and 



Internal Structure) ... 19 



IV. THE CRAYFISH (CAMBARUS SP.) (External and Internal 



Structure) ........ 28 



V. AMCEBA, PARAMCECIUM AND VORTICELLA (Structure and 



Behavior) . .37 



VI. ANIMAL PHYSIOLOGY 49 



PART II 

 THE LIFE-HISTORY OF ANIMALS 



VII. MULTIPLICATION AND DEVELOPMENT . . .79 



VIII. MOSQUITOES AND CATERPILLARS . . .85 



IX. FROGS AND BIRDS ........ 97 



PART III 



DIFFERENT KINDS OF ANIMALS, THEIR CLASSIFICATION, 

 HABITS AND SPECIAL RELATION TO MAN 



X. THE CLASSIFICATION OF ANIMALS ..... 107 



XI. THE SIMPLEST, OR ONE-CELLED, ANIMALS (PROTOZOA) . 118 



XII. HUMAN DISEASES CAUSED BY ONE-CELLED ANIMALS . . 124 



XIII. THE INVERTEBRATES ....... 132 



XIV. THE INVERTEBRATES (continued): ARTHROPODS AND MOL- 



LUSCS ......... 149 



XV. FIGHTING INSECT PESTS ....... 180 



XVI. THE VERTEBRATES: FISHES, BATRACHIANS, AND REPTILES 191 

 XVII. THE VERTEBRATES (continued): BIRDS .... 214 



XVIII. THE VERTEBRATES (continued'): MAMMALS . . . 237 



XIX. DOMESTICATED ANIMALS . ...... 258 



XX. FOSSIL ANIMALS 275 



