LIST OF ILLUSTRATIONS xvii 



FIG. PAGE 



81. The castor-bean tick 143 



82. The American dog or wood tick 144 



83. Linguatula rhinaria 153 



84. Planarian worm 156 



So. Liver fluke, Fasciola hepatica 157 



86. Reproductive organs of liver fluke 158 



87. Fasciola hepatica, F. americanus, Dicrocoehum lanceatum 161 



88. Life history of liver fluke 162 



89. Blood fluke, male and female IBS 



90. Segment of Taenia saginata, showing sexual organs 171 



91. Tapeworms of the horses 175 



92. Tapeworm of cattle and sheep, Moniezia expansa. 176 



93. Fringed tapeworm of sheep, anterior segments . 177 



94. Tapeworm of dog, Dipylidium caninum 180 



95. RosteUum of Dipyhdium caninum 180 



96. Egg packet and Cysticercoid of Dipyhdium caninum 180 



97. Tapeworm of dog. Taenia hydatigena 180 



98. Tapeworm of dog. Taenia pisiformis 180 



99. Tapeworm of dog, Echinococcus granulosus 180 



100. RosteUum of tapeworm of cat. Taenia tsenisBformis 184 



101. Diphyllobothrium latum 186 



102. Tapeworm of chicken, Choanotsenia infundibuUformis 189 



103. Scolex of Choanotsenia infundibuUformis 190 



104. Scolex of Davainea tetragona of chicken 190 



105. Scolex of Davainea echinobothrida of chicken 190 



106. Tapeworm of man. Taenia saginata 196 



107. Diagram of Cysticercus 198 



108. Fragment of beef muscle, showing cysts of Cysticerus bovis 198 



109. Scoleces of Taenia soUum, T. saginata, and DiphyUobothrium latum . . . 199 



110. Eggs of Taenia saginata and T. solium 200 



111. Mature segments of Taenia saginata and T. solium 200 



112. Stages in tapeworm development 201 



113. Portions of adult gid tapeworm, Multiceps multiceps 205 



114. Diagrammatic section of Multiceps (Ccenurus) cyst 206 



115. Brain of lamb, showing furrows produced by young gid bladderworm. . 206 



116. Gid bladderwonn, showing unmature tapeworm heads 206 



117. Diagram of Echinococcus hydatid 211 



118. Echinococcus granulosus, showing hydatid with brood capsules 214 



119. Transection of Ascaris eqxii 217 



120. Posterior extremity of male nematode worm 218 



121. CephaUc extremity of an ascarid worm 229 



122. Oxyuris equi 236 



123. Belascarismarginata, showing head and male and female 238 



