CONTENTS. Vll 



MB 



Pulex 156 



Pediculus 156 



Arachnida 157 



Sarcoptes 157 



Demodex 158 



Myriapoda 159 



Scolopcndra 159 



Annelida 159 



Hirudo 159 



Entozoa 161 



Nematoidea 161 



Trichina 161 



Strongylus 162 



Trichocephalus 162 



Ascaris 163 



Oxyuris 164 



Sclerostoma 164 



Dracunculus 164 



Eustrongylus 165 



Trematoda 165 



Fasciola 165 



Distoma 166 



Bilharzia '. 167 



Tetrastoma 168 



Hexathyridium 168 



Development of trematoda 168 



Cestoda 169 



Tsonia 169 



Bothriocephalus 171 



Development of Cestoda 172 



Mollusca 174 



Sepia 174 



Protozoa 174 



Infusoria 174 



Virgulina 174 



Vibrio 174 



Paramecium 175 



Cercomonas 176 



Trichomonas 175 



Psorospermise 175 



Gregarinidse 176 



Spongia 177 



Additions ! 178 



TABLE OF CLASSIFICATION 179 



INDEX ,. 185 



