CONTENTS 



POEIFEEA (SPONGES) 

 CHAPTER VII 



PAGE 



PoEiFBRA. (Sponges) — Introduction — History — Description of Hali- 



OHONDRIA PANWEA AS AN EXAMPLE OF BRITISH MARINE SPQNGES AND 

 OF EpHYDATIA FLUVIATILIS FROM FllESH WaTER — DEFINITION — POSI- 

 TION IN THE Animal Kingdom . . 165 



CHAPTER VIII 



PORIFEEA (CONTINUBD) : FoRMS OF SPICULES — CaLOAKBA — HOMOCOELA — 



Heterocoela — Hexaotinellida — Demospongiae — Tetractinellida 



— MONAXONIDA — CeRATOSA — KEY TO PjRITISH GeNERA OF SpONGES . 183 



CHAPTER IX 



PORIFEUA {continued): REPRODUCTION, SeXUAL AND ASEXUAL — PHYSIO- 

 LOGY' — Distribution — Flints 226 



COELENTEEATA 

 CHAPTER X 



COELENTERATA — INTRODUCTION — CLASSIFICATION — HydROZOA — ElEUTHERO- 

 BLASTEA^MlLLUPORINA — GyMNOBLASTBA — CaLY'PTOBLASTEA — GrAPTO- 

 LITOIDEA — StYLASTERINA 245 



CHAPTER XI 



HyDROZOA (CONTINVEU) : TeACHOMEDUSAE — jSTaECOMEDUSAE — SiPHONOPHOKA 288 



CHAPTER XII 



Coelenterata (coat/atd-^d) : Soyphozoa = Scyphomedusae . . . 310 



CHAPTER XIII 



Coelenterata (continued) : Anthozoa = Aotinozoa — General Charac- 

 ters — Alcyonaeia 326 



CHAPTER XtV 



AnTHOZOA (continued) : ZoANTHARIA ggg 



