CONTENTS. 



PAGE 



INTRODUCTION.. 1 



Definition of Zoology 1 



Morphology 5 



Organs and their Functions 8 



Correlation of Organs 9 



Adaptation of Organs 10 



Analogy and Homology 13 



Physiology 12 



Psychology 13 



Reproduction 13 



Embryology 13 



Classification 13 



ZoSgeography 16 



CHAPTER 1. Branch 1. Protozoa 17 



II. " 2. PoBiFEBA (Sponges) 43 



III. " 3. CoBLENTBRATA (Hydroids, Jelly-fishes, 



and Polyps) 51 



IV. " 4. EcHiNODEBMATA (Crinoids, Starfish, 



Sea Urchins, etc 96 



V. " 5. Vbbmes (Worms) 138 



VI. " 6. MOLLUSCA (Bivalves, Snails, Cuttles)... 230 



VII. " 7. Abthropoda (Crustaceans and Insects) 265 



VIII. " 8. Vebtebbata 369 



IX. COMPABATtvB Anatomy of Organs 631 



Organs of Digestion, the Mouth and Teeth. . . 631 



Organs of Circulation 635 



Organs of Respiration 687 



The Nervous System 638 



Organs of Sense 640 



