CONTENTS. 



PART SECOND. 

 THE FIVE GREAT ANIMAL GROUPS. 



CHAPTER VI. PAO 



THE IDEAL TYPES. ALL ANIMALS BILATERAL ...... 117 



CHAPTER VII. 



THE DISTINCTION BETWEEN ANIMALS AND PLANTS. THE PSEUDO-INFUSO- 



KIA, THEIK PLANT-NATURE. THE PLANT-LIKE INFUSORIA . . . 131 



CHAPTER VIII. 



THE PHYTOZOA, OR PLANT-ANIMALS. THEIR RELATION TO UNDOUBTED 



ANIMALS 153 



CHAPTER IX. 



THE SYMBOLICAL ANIMAL. THE PROTOZOA 168 



CHAPTER X. 



ZOOPHYTA ...... 177 



CHAPTER XI. 



MOLLUSCA 195 



CHAPTER XII. 



ARTICULATA 214 



CHAPTER XIII. 



VERTEBRATA 226 



CHAPTER XIV. 



THE DISTINCTNESS OF THE FIVE GRAND DIVISIONS 236 



CHAPTER XV. 



THE MIMETIC FORMS OF DIVERSE TYPES OF ANIMALS ..... 248 



CHAPTER XVI. 



THE TRANSITIONS AMONG THE SUBORDINATE TYPES OF THE FIVE GRAND 



DIVISIONS 254 



