CONTENTS. 



PART III. THE CCELENTERATA. 



CHAPTER I. 

 The Hydrozoa page 69 78 



CHAPTER II. 



The Hydrozoa (continued} The Calycophoridse ... 78 86 



CHAPTER III. 



The Hydrozoa (continued ) The Physophoridae 8 6 92 



CHAPTER IV. 

 TheMedusidae 9299 



CHAPTER V. 

 Phosphorescence of the Sea Reproduction of the Hydrozoa ... 99 105 



CHAPTER VI. 

 TheActinozoa 105110 



CHAPTER VII. 

 Coral ... .. 111117 



CHAPTER VIII. 

 Coral (continued} 117 122 



CHAPTER IX. 

 Coral Islands 122129 



