CONTEI^TS. 



PAGE 



INTRODUCTION 1 



Definition of Zoology 1 



Morphology 5 



Organs and tlieir Functions 8 



Correlation of Organs 9 



Adaptation of Organs 10 



Analogy and Homology 12 



Physiology 12 



Psychology 13 



Reproduction 13 



Embryology 13 



Classification 13 



Zoogeography 16 



CHAPTER I. Branch 1. Protozoa 17 



II.* " 2. PORiFERA (Sponges) 42 



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



and Polyps) ol 



IV. " 4. EcHiNODBRMATA (Crinoida, Starfish, 



Sea Urchins, etc 96 



V. " 5. Vermes (Worms) 13& 



VI. " 6, MOLLUSCA (Bivalves, Snails, Cuttles). . . 240 



VII. " 7. Artiiropoda (Crustaceans and Insects) 285 



VIII. " 8. Vertebrata 389 



IX. Compakative Anatomy op Organs 631 



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



Organs of Circulation 635 



Organs of Respiration 637 



The Nervous System 638 



Organs of Sense 640 



