Xll CONTENTS. 



CHAPTER XXVI. 



Nematelmia Acanthocephala Gordiacea Nematoda Parasitic 



Nematoids Free Nematoids, i93-!97 



CHAPTER XXVII. 



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

 fera, 198-202 



CHAPTER XXVIII. 



Annulosa General characters of the Annulosa General characters of 

 the Anarthropoda Class Gephyrea General characters of the 

 class Annelida, 203-207 



CHAPTER XXIX. 



Divisions of the Annelida Hirudinea Oligochseta Tubicola 

 Errantia Distribution of the Annelida in time Tabular view of 

 the Annelida Class Chsetognatha, 207-217 



CHAPTER XXX. 

 Arthropoda General characters Divisions of Arthropoda, . 217-218 



CHAPTER XXXI. 



Crustacea Characters of the class Crustacea General morphology of 

 Crustacea Divisions .of Crustacea, 219-226 



CHAPTER XXXII. 



Epizoa Ichthyophthira Rhizocephala Cirripedia Characters of 



Cirripedia Development Reproduction Divisions, . 226-233 



CHAPTER XXXIII. 



Entomostraca Lophyropoda Ostracoda Copepoda Branchio- 

 poda Cladocera Phyllopoda Trilobita Merostomata > 

 Xiphosura Eurypterida, 233-241 



CHAPTER XXXIV. 



Malacostraca Edriophthalmata Laemodipoda Amphipoda Iso- 

 poda Podophthalmata Stomapoda Decapoda Macrura 

 Anomura Brachyura, 242-251 



CHAPTER XXXV. 



Distribution of the Crustacea in space Distribution of the Crustacea 



in time, 251-254 



CHAPTER XXXVI. 



General characters and divisions of the Arachnida, . . . 254-258 



