viii CONTENTS 



GEPHYEEA AND PHOKONIS 

 CHAPTER XV 



GEPHYREA 



PAGE 



Introduction Anatomy Development Sipunculoidea -*- Pria- 

 puloidea echiuroidea epithetosomatoidea affinities of the 

 Group 411 



CHAPTER XVI 



phoronis 



History Habits Structure Reproduction Larva Metamorphosis 



List of Species and Localities Systematic Position . . . 450 



POLYZOA 

 CHAPTER XVII 



POLYZOA 



Introduction General Characters and Terminology Brown Bodies 

 History Outlines of Classification Marine Polyzoa Occur- 

 rence Forms of Colony and of Zooecia Ovicells Avicularia 

 Vibracula Entoprocta 465 



CHAPTER XVIII 



polyzoa continued 



Fresh- water PolyzoA Phylactolaemata Occurrence Structure of 

 Crist atella Division of Colony Movements of Colony Retrac- 

 tion and Protrusion of Polypides in Polyzoa Statoblasts Table 

 for Determination of Genera of Fresh-water Polyzoa Repro- 

 ductive Processes of Polyzoa Development Affinities Meta- 

 morphosisBudding . . . 492 



CHAPTER XIX 



polyzoa continued 



Classification Geographical Distribution Palaeontology Methods 

 for the Examination of Specific Characters Terminology Key 

 for the Determination of the Genera of British Marine Polyzoa 515 



Addendum to Chaetognatha . . . . . . . . . 534 



Index 535 







