CONTENTS 



CHAPTER PAGE 



Introduction ------- 9 



I. The Simplest Animals - - - - - 13 



II. Polyps ---------19 



III. Crustaceans -------33 



IV. ECHINODERMS -------59 



V. Worms and Polyzoa ----- 73 

 VI. Molluscs --------84 



VII. TUNICATES OR ASCIDIANS AND LANCELETS - 114 



VIII. Fishes --------- 120 



IX. Reptiles --------171 



X. Mammals - - - - - - - -183 



XI. Sea Monsters - - - - - - -198 



Index --------- 209 







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