167 Miracidia of _Dicrocœlium dendriticum_. (After Leuckart) 266 168 _Echinostoma ilocanum._ (After Brumpt) 268 169 _Echinostoma ilocanum._ (After Leiper) 268 170 _Echinostoma malayanum_, Leiper. (After Leiper) 269 171 _Schistosoma hæmatobium._ (After Looss) 270 172 Transverse section through a pair of _Schistosoma hæmatobium_ in copulâ. (After Leuckart) 271 173 Anterior end of the male _Schistosoma hæmatobium_. (After Looss) 271 174 _Schistosoma hæmatobium._ (After Leuckart) 276 175 _Schistosoma hæmatobium_, ovum of. (After Looss) 277 176 _Schistosoma japonicum._ (After Katsurada) 278 177 _Schistosoma japonicum._ (After Katsurada) 279 178 _Schistosoma japonicum._ (After Looss) 279 179} 180} _Schistosoma japonicum_ from dog. (After Katsurada) 280 181} 182 _Schistosoma japonicum._ (After Catto) 281 183 _Schistosoma japonicum._ (After Katsurada) 282 184 Schematic representation of a small part of a transverse section of _Ligula_ sp. (After Blochmann) 287 185 Half of a transverse section through a proglottis of _Tænia crassicollis_ 288 186 _Dipylidium caninum._ (After Benham) 289 187 Longitudinal section of the head and neck of _Tænia crassicollis_ 290 188 _Tænia cœnurus._ (After Niemisec) 291 189 Young _Acanthobothrium coronatum_. (After Pintner) 292 190 Scolex of a cysticercoid from _Arion_ sp. (After Pintner) 292 191 Proglottis of _Tænia saginata_, Goeze, showing genitalia 293 192 _Dibothriocephalus latus._ (After Benham and Sommer and Landois) 294 193 Diagram of genitalia of a Cestode. (Stephens) 295 194 Part of a transverse section through a proglottis of _Dibothriocephalus latus_ 296 195 Egg of _Diplogonoporus grandis_. (After Kurimoto) 298 196 Uterine egg of _Tænia saginata_. (After Leuckart) 298 197 Oncosphere of _Tænia africana_ (after v. Linstow) and oncosphere of _Dipylidium caninum_. (After Grassi and Rovelli) 299 198 Diagram of a cysticercoid. (Stephens) 301 199 Diagram of a cysticercus. (Stephens) 301 200 Diagram of development of a cysticercus. (Stephens) 303