LIST OF ILLUSTRATIOIfS xxiii 



FlG. 



191. Ti^nia solium 



192. ,, „ head 



PAGE 



177. Dicyema paradoxum, male 231 



178. Rhopaliua giardii, male . . .... 232 



179. ,, ,, female . . . . 232 



180. Salinella, longitudinal .section . . . 233 



181. ,, transverse ,, .... 234 



182. Planaria, digestive and excretory systeni.s , . . 237 



183. ,, nervous system ... . . 237 



184. ,, reproductive system 



185. Transverse section of a Planarian . . . 



186. Bistomura hepaticum 



187. ,, ,, section of integument 



188. ,, ,, internal organisation 



189. ,, ,, terminal part of rei>rodiictive apparatus 



190. ,, ,, development 



239 

 240 

 240 

 241 

 242 

 243 

 244 

 24t> 

 247 



193. ,. ,, transverse section . 247 



194. ,. ,, proglottis ... , 248 



195. ,, ,, ripe proglottis . . 250 



196. „ „ development . 251 



197. Various Planarians . . . 255 



198. Gunda segmentata . . . 250 



199. Digenetic Trematodes . . . . 257 



200. Gyrodactylus and Polystomum . . 258 



201. Temnocephala . . . 259 



202. Actinodactylella . , . . . 260 



203. Tetrarhynchus . ... 261 



204. Taenia echinococcus . . 261, 



205. Ligula ... , . 262 



206. Caryophylteus . . . 263 



207. Gyrocotyle . . . . . ■ 263 



208. Archigetes ... .... 26:^ 



209. Section of body-wall of a Triclad . 264 



210. Parenchyma of Pl^t-worm . 265 



211. Diagram of Rhabdocrele . 266 



212. „ ., Polyclad . . . 266 



213. „ „ Triclad . . 267 



214. Flame-cell ... . . 269 



215. Reproductive organs of Mesostomum ehrenbergii . 272 



216. Development of a Polyclad . . . . 274 



217. Miiller's larva ... 



218. Embryos of Dendrocoelum . . 276 



219. Embryo of Temnocephala ... . . 278 



220. „ „ . . 



221. A Cysticercoid 



222. ,, with head evaginated 



223. Cyst of Tsenia echinococcus . 



224. Scolices ,, ,, 



279 

 280 

 281 



282 

 282 



