X CONTENTS. 



CHAPTER VI. 



Infusoria Order Ciliata Suctoria Flagellata Noctiluca Phos- 

 phorescence of the Sea, ....... 76-84 



CHAPTER VII. 



General characters of the Ccelenterata Divisions of the Ccelenterata 



Hydrozoa General terminology of the Hydrozoa, . . 85-90 



CHAPTER VIII. 



Divisions of the Hydrozoa Sub-class Hydroida Order Hydrida 

 Order Corynida Reproduction of Hydroida Sertularida Cam- 

 panularida, 90-103 



CHAPTER IX. 



Siphonophora or Oceanic Hydrozoa Calycophoridse Divisions of 



Calycophoridae Physophoridae Divisions of Phyeophoridae, 103-110 



CHAPTER X. 



Discophora Structure of Medusidae Value of Medusidae as an order 



of Hydrozoa, . . . 110-113 



CHAPTER XI. 



Lucernarida Steganophthalmate Medusae Lucernariadse Pelagidae 

 Rhizostomidae Reproduction in Rhizostomidae Sub-class 

 Graptolitidae Definition of the Sub-class Structure of Grapto- 

 lites, 114-122 



CHAPTER XII. 



Distribution" of Hydrozoa in space Distribution of Hydrozoa in time 



Oldhamia Corynida Sertularida Graptolites, . . 123-124 



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, . . 124-137 



CHAPTER XIV. 



Alcyonaria Alcyonidae Tubiporidae Pennatulidse Gorgonidse 

 , Red Corals, . . . . . . . . . 137-140 



CHAPTER XV. 



Rugosa Distinctions between the Coralla of the different Orders of 



Actinozoa, 140-142 



