CONTENTS. 



CHAPTER VI. 



Infusoria Order Ciliata Suctoria Flagellata Noctiluca Phos- 



phoresence of the Sea, 66-73 



CHAPTER VII. 



General characters of the Coelenterata Divisions of the Coelenterata 



Hydrozoa General terminology of the Hydrozoa, . . 74~7& 



CHAPTER VIII. 



Divisions of the Hydrozoa Sub-class Hydroida Order Hydrida 

 Order Corynida Reproduction of Hydroida Sertularida Cam- 

 panularida, 78-88 



CHAPTER IX. 



Siphonophora or Oceanic Hydrozoa Calycophoridae Divisions of 



Calycophoridae Physophoridae Divisions of Physophoridae, 89-95 



CHAPTER X. 



Discophora Structure of Medusidae Value of Medusidae as an Order 



of Hydrozoa, . . 95'99 



CHAPTER XI. 



Lucernarida Steganophthalmate Medusas Lucernariadae Pelagidae 

 Rhizostomidae Reproduction in Rhizostomidaa Sub-class 

 Graptolitidaa Definition of the Sub-class Structure of Grapto- 

 lites, 99-107 



CHAPTER XII. 



Distribution of Hydrozoa in space Distribution of Hydrozoa in time 



Oldhamia Corynida Sertularida Graptolites, . . 107-109 



CHAPTER XIII. 



General characters of the Actinozoa Zoantharia Malacodermata 

 Actinidae Ilyanthidae Zoanthidse Zoantharia Sclerobasica 

 Sclerobasic and Sclerodermic Corals Antipathidae Hyalone- 

 madae Zoantharia Sclerodermata Gemmation and fission 

 amongst Corals, 109-119 



CHAPTER XIV. 



Alcyonaria Alcyonidae Tubiporidas Pennatulidae Gorgonidae 



Red Coral, 119-122 



CHAPTER XV. 



Rugosa Distinctions between the Coralla of the different Orders of 



Actinozoa, ......... 123-124 



