TABLE OF CONTENTS 



Order Merozoa P^^^e 225 



[Suborder Tetraphyllidea] 

 [Suborder Diphyllidea] 

 [Suborder Tetrarhynchidea] 

 [Suborder Pseudophyllidea] 

 [Suborder Cyclophyllidea] 



CHAPTER VII 



Phylum Nemertea ^33 



Phylum Rotifera J^ 



Phylum Gastrotricha ^^ 



CHAPTER VIII 



Phylum Nematoda ^ 



Phylum Nematomorpha ^57 



Phylum Acanthocephala 5 



CHAPTER IX 



[Coelomata] ^^^ 



Phylum Annelida ^^^ 

 Class Chaetopoda 



Order Polychaeta ^^^ 



Order Oligochaeta ^^^ 



Class Archiannelida ^94 



Class Hirudinea ^^^ 



Class Echiuroidea 3 



Class Sipunculoidea 3 4 



CHAPTER X 

 Phylum Arthropoda 



CHAPTER XI 



305 



Subphylum Onychophora 3^7 



Subphylum Trilobita 3 3 



CHAPTER XII 



Subphylum Crustacea ^2 



Class Branchiopoda 353 



Order Anostraca 35 

 [Order Lipostraca] 



