Xii CONTENTS. 



CHAPTER XXVI. 



Vematelmia — Acanthocephala — Gordiacea — NemKtoda — Parasitic 

 Nematoids — Free Neraatoids, . • I7S"'79 



CHAPTER XXVII. 



Rotifera — General characters of the Rotifera — Affinities of the Roti- 



fera, . , . , 179184 



CHAPTER XXVI 11. 



Annulosa— General characters of the Annulosa— General characters 

 of the Anarthropoda — Class Gephyrea — General characters of the 

 class Annelida, 185-189 



CHAPTER XXIX. 



Divisions of the Annelida — Hirudinea — Oligochseta — Tubicola — 

 Errantia — Distribution of the Annelida in time — Tabular view 

 of the Annelida — Class Chcetognatha, . . . .189-199 



CHAPTER XXX. 

 A rthropoda — General characters — Divisions of Arthropoda, . 199-200 



CHAPTER XXXI. 



Crustacea — Characters of the class Crustacea — General morphology of 



Crustacea — Divisions of Crustacea, ..... 200-208 



CHAPTER XXXII. 



Epizoa — Ichthyophthira — Rhizocephala — Cirripedia — Characters of 

 Cirripedia — Development — Reproduction — Divisions, . . 208-215 



CHAPTER XXXIII. 



Entomostraca — Lophyropoda — Ostracoda — Copepoda — Branchio- 

 poda — Cladocera — Phyllopoda — Trilobita — Merostomata — 

 Xiphosura — Eurypterida, 215-22J 



CHAPTER XXXIV. 



Malacosf raca — Edriophthalmata — LiEmodipoda — Amphipoda — Iso- 

 poda — Podophthalmata — .Stomapoda — Decapoda — Macrura — 

 Anomura — Brachyura, ....... 223-233 



' CHAPTER XXXV. 



Distribution of the Crustacea in space — Distribution of the Crustacea 

 in time, 233-234 



CHAPTER XXXVI. 

 General characters and divisions of the Arachnids, . . , 235-238 



