VI CONTENTS. 



CHAPTER VII. p^GE 



Some Aqua-tic Worms, Ch^etonotus and Chi- 

 RONOMUS Larva, - - 173 



CHAPTER VIII. 

 Rotifers, 213 



CHAPTER IX. 

 Fresh-Water Polyzoa, 237 



CHAPTER X. 



Entomostraca and Phyllopoda, 257 



CHAPTER XI. 

 Water-mites and the Water-Bear, 279 



CHAPTER XII. 

 Some Common Objects Worth Examining, - 292 



GLOSSARY, - - - 309 



INDEX, 31S 



