CONTENTS 



CHAPTER . PAGES 



I. EARTHWORMS AND LEECHES . . . 1 32 

 BRITISH OLIGOCH^TE WORMS . 3347 



II. THE CRAYFISH ... . 4870 



III. THE COCKROACH .... 7192 

 BRITISH ORTHOPTERA . . . . . 9298 



IV. DRAGONFLIES 99112 



BRITISH DRAGONFLIES 112122 



V. WASPS 123-159 



BRITISH WASPS 159161 



VI. THE FRESH- WATER MUSSEL .... 162202 

 BRITISH FRESH-WATER LAMELLIBRANCHS . 202204 



VII. SNAILS AND SLUGS 205234 



BRITISH LAND AND FRESH-WATER GASTROPODS 235245 



VIII. FROGS, TOADS, AND NEWTS .... 246292 



BRITISH AMPHIBIA ... . 292301 

 IX. SOME COMMON INTERNAL PARASITES OF 



DOMESTIC ANIMALS 302 321 



INDEX 323331 



