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 Sparrow (External Structure) . 8 



III. The Garden Toad (Bufo 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 . . 8S 



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 



