CONTENTS. 



CHAPTER VI. 

 Infusoria— Order Ciliata — Suctoria — Flagellata — Noctiluca — Thos- 



phorescence of the Sea, 70"77 



CHAPTER VII. 



General characters of the Coelenterata — Divisions of the Ccelenterata 



— Hydrozoa — General terminology of the Hydrozoa, . . 78-S2 



CHAPTER VIII. 



Divisions of the Hydrozoa— Sub-class Hydroida— Order Hydrida— 

 ' Order Corynida— Reproduction of Hydroida — Sertularida — Cam- 

 panularida, . • 83-93 



CHAPTER IX. 



Siphonophora or Oceanic Hydrozoa — Calycophoridse — Divisions of 



CalycophoridseT-Physophoridse — Divisions of Physophoridse, 93-100 



CHAPTER X. 



Discophora — Structure of Medusidse — Value of Medusidoe as an order » 

 of Hydrozoa, . . . . , . . . . 100-103 



CHAPTER XI. 



Lucernarida — Steganoi^hlhalmate Medusae — Lucernariadoe — Pelagidse 

 — Khizostomidre — Reproduction in Rhizostomidse — Sub-class 

 Graptolitidee — Definition of the Sub-class — Structure of Grapto- 

 lites, 104-ilz 



CHAPTER XII. 



Distribution of Hydrozoa in space — Distribution of Hydrozoa in time 



— Oldliamia — Corynida^— Sertularida— Graptolites, , . 112-114 



CHAPTER XIII. 



General characters of the Actinozoa — Zoantharia Malacodermata — 

 Actinidse — llyanthidae — Zoauthidje — Zoantharia Sclerobasica — 

 Sclerobasic and Sclerodennic Corals^Antipathidte — Hyalone- 

 madte— Zoantharia Sclerodermata — Gemmation and fission 

 amongst Corals, ........ 114-125 



CHAPTER XIV. 



Alcyonaria — Alcyonidje — Tubiporidte- — Pennatulidre — Gorgonidas — 



Red Coral, . ... . . . . , 125-128 



CHAPTER XV. 



Uugosa— Distinctions between the Coralla of the different Orders of 

 Actinozoa, 128-130 



