vi CONTENTS 



PORIFERA (SPONGES) 

 CHAPTER VII 



PAGE 



Porifera (Sponges) Introduction History Description of Hali- 

 chondr1a panicea as an example of british marine sponges and 

 of Ephydatia fluviatilis from Fresh Water Definition Posi- 

 tion in the Animal Kingdom 165 



CHAPTER VIII 



Porifera {continued): Forms of Spicules Calcarea Homocoela 

 Heterocoela Hexactinellida Demospongiae Tetractinellida 

 monaxonida ceratosa key to british genera of sponges , 183 



CHAPTER IX 



Porifera (continued): Reproduction, Sexual and Asexual Physio- 

 logyDistribution Flints ........ 226 



COELENTERATA 



CHAPTER X 



Coelenterata Introduction Classification Hydrozoa Eleuthero- 

 blastea Milleporina Gymnoblastea Calyptoblastea Grapto- 

 litoidea Stylasterina . . 245 



CHAPTER XI 

 Hydrozoa (continued) : Trachomedusae Narcomedusae Siphonophora 288 



CHAPTER XII 



Coelenterata (co ntinued) : Scyphozoa = Scyphomedusae . . . 310 



CHAPTER XIII 



Coelenterata (continued) : Anthozoa = Actinozoa General Charac- 

 ters Alc yon aria 326 



CHAPTER XIV 

 Anthozoa (continued) : Zoantharia 365 



