CONTENTS 



PART I 



CHAPTER PAGE 



I. ANIMALS AND THE STUDY OF ANIMALS .... i 



II. A STUDY OF THE FROG 4 



III. A STUDY OF THE GRASSHOPPER 14 



IV. A STUDY OF HYDRA 21 



V. A STUDY OF AMOEBA 25 



VI. THE ONE-CELLED ANIMALS ....... 29 



VII. ONE-CELLED AND MANY-CELLED ANIMALS ... 39 



VIII. THE CLASSIFICATION OF ANIMALS ..... 48 



IX. SPONGES AND SPONGE FISHING 58 



X. SEA-ANEMONES, JELLY-FISHES, CORALS AND CORAL 



ISLANDS 63 



XI. LIVER-FLUKES, TAPE-WORMS, AND OTHER PARA- 

 SITIC FLAT-WORMS 69 



XII. TRICHINAE, HOOKWORMS, FILARIA, AND OTHER 



PARASITIC ROUND WORMS 79 



XIII. STARFISHES, SEA-URCHINS, AND SEA-CUCUMBERS . 89 



XIV. EARTHWORMS, LEECHES, AND OTHER SEGMENTED 



WORMS " 98 



XV. CRAYFISH, LOBSTERS, CRABS, SHRIMPS, ETC. . . 106 



XVI. SLIME SLUGS, MYRIAPODS AND INSECTS .... 123 

 XVII. CLASSIFICATION OF INSECTS, AND INSECT BENEFITS 



AND INJURIES 153 



XVIII. INSECTS (CONT'D) WASPS, ANTS, THE HONEY BEE 



AND OTHER BEES 183 



XIX. SCORPIONS, SPIDERS, MITES AND TICKS .... 206 

 XX. OYSTERS, CLAMS, MUSSELS, OTHER MOLLUSCS, AND 



THE SHELLFISH INDUSTRIES 216 



XXI. FISHES AND FISHERIES 237 



XXII. TOADS, FROGS AND SALAMANDERS 256 



XXIII. SNAKES, LIZARDS, TURTLES, AND CROCODILES . . 260 



XXIV. BIRDS. 273 



XXV. MAMMALS 295 



ix 



