CONTENTS. Xlll 



CHAPTER XVII. 



General characters of the Zoantharia — Classification of Zoantharia — 

 Distribution of Zoantharians in time — Characters and divisions 

 of the Madreporaria — Characters and geological distribution of 

 the Madreporaria Aporosa — The Turbinolidae — Oculinidae — 

 Pocilloporidae — Astrasidae — Holocystis — Stauria — Acervularia — 

 Columnaria — Moseleya, 261-275 



CHAPTER XVIII. 



General characters of the Madreporaria Rugosa — Structure of the 

 corallum of the Rugosa — Kunth's law of the development of the 

 septa — Classification of the Rugosa — Cyathophylloid Rugosa — 

 Cyathophyllidae — Heliophyllidae — Clisiophyllidae — Zaphrentoid 

 Rugosa — Zaphrentidae — Hadrophyllidae — Palaeocyclidas — 

 Streptelasmidae — Lindstrcemia — Cystiphylloid Rugosa — Cysti- 

 phyllidae — Calceolidae, 276-302 



CHAPTER XIX. 



General characters of the Madreporaria Fungida — Plesiofungidae — 

 Fungidae — Lophoseridas — Anabacidas — Plesioporitidas — Gene- 

 ral characters and geological distribution of the Madreporaria 

 Perforata — Eupsammidae — Madreporidae — Poritidse — Favosi- 

 tidse — Syringoporidas — Thecidas, 303-323 



CHAPTER XX. 



General characters of the Alcyonaria — Divisions of the Alcyonaria — ■ 

 Distribution in time — Pseudaxonia — Tubiporidae — Gorgonidas— 

 Pennatulidae — Helioporidae — Heliolitidae — Halysitidae — Tetra- 

 diidae — Chastetidse — Auloporidas — Literature of Actinozoa, 324-345 



CHAPTER XXI. 



The general characters of the Monticuliporoids — Zoological affinities 

 of the Monticuliporoids — Geological distribution — Monticulipor- 

 idae — Fistuliporidae, 346-360 



CHAPTER XXII. 



The general characters of the Echinodermata — The digestive, am- 

 bulacral, and reproductive systems of Echinoderms — Minute 

 structure of the skeleton of the Echinoderms — Bolboporites — 

 Classification of Echinoderms — Distribution of Echinoderms in 

 time, 361-365 



