CONTENTS. 



CHAPTEE VII. 



General Characters of the Coelenterata Divisions of the Ccelenterata 

 Hydrozoa General Terminology of the Hydrozoa . . PAGE 66-69 



CHAPTEE VIII. 



Divisions of the Hydrozoa Sub-class Hydroida Order Hydrida 

 Order Corynida Keproduction of Hydroida Sertularida Cam- 

 panularida 69-78 



CHAPTEE IX. 



Siphonophora or Oceanic Hydrozoa Calycophoridse Divisions of 

 Calycophoridse Physophoridse Divisions of Physophoridse . 78-84 



CHAPTEE X. 



Discophora Structure of Medusidse Value of Medusidse as an Order 

 of Hydrozoa 84-87 



CHAPTEE XI. 



Lucernarida Steganophthalmate Medusae Lucernariadse Pelagidae 

 Ehizostomidse Eeproduction in Ehizostomidse Sub-class Grap- 

 tolitidse Definition of the Sub-class Structure of Graptolites . 87-95 



CHAPTEE XII. 



Distribution of Hydrozoa in Space Distribution of Hydrozoa in Time 

 Oldhamia Corynida Sertularida Graptolites . . . 95-96 



CHAPTEE XIII. 



General Characters of the Actinozoa Zoantharia Malacodermata 

 Actinidse -Ilyanthidse Zoanthidse Zoantharia Sclerobasica Sele- 

 robasic and Sclerodermic Corals Antipathidse Hyalonemadse 

 Zoautharia Sclerodermata Gemmation and Fission amongst Corals 



97-106 



CHAPTEE XIV. 



Alcyonaria Alcyonidse Tubiporidse Pennatulidse Gorgonidse 

 Eed Coral 106-109 



CHAPTEE XV. 



Eugosa Distinctions between the Coralla of the different Orders of 

 Actinozoa 109-110 



