CONTENTS 



SECTION VII 



Phylum Echinodermata 



Class i. The Asteroidea .... 



Example of the Class — - Asterias vulgaris 

 Class 2. The Ophiuroidea 



Example of the Class — Ophioglypha lacerlosa 

 Class 3. The Echinoidea .... 



Example of the Class — Strongylocentrotus 

 Class 4. The Holothuroidea 



Example of the Class — Holothuria edulis 

 Class 5. The Crinoidea .... 



Example of the Class — Antedon 



PAGE 



157 

 '57 

 '57 

 169 

 169 

 170 

 170 

 '73 

 173 

 ■74 

 174 



SECTION VIII 

 ROTIFERA, POLYZOA, AND BRACHIOPODA . 



Class 1. Rotifera 



Example of the Class — Brachionus rubens 

 Class 2. Polyzoa 



Example of the Class — Bugula avicularia 

 Class 3. Brachiopoda 



Example of the Class — Magellania Jlavescens 



178 

 178 

 17S 

 181 

 181 

 184 

 1S4 



SECTION IX 



Phylum Annulata . . . ' -; 188 



Class 1. The Chsetopoda 188 



Example of the Class — Nereis dumerilii . . . .189 

 Class 2. The Hirudinea 203 



Example of the Class — Hirudo medicinalis . . . 203 



SECTION X 



Phylum Arthropoda 212 



Class 1. The Crustacea 213 



Example of the Class — Astacus fluviatilis . . .213 



Class 2. The Onychophora 236 



Example of the Class — Peripatus ..... 236 



