xxiv LIST OF ILLUSTRATIONS 



FIG. PAGE 



228. Scolices . 277 



229. Scolex of Taenia echinococcus 277 



230. Process of budding in Microstomum 278 



231. Bilharzia hsematobia 281 



232. Diagram of the relationships of the Platyhelminthes and Nemertinea 283 



233. Diagram of Nemertine . ... ... 284 



234. Proboscis of Nemertine 285 



235. Tetrastemma 286 



236. Anterior portion of Nemertine 287 



237. Proboscis of Metanemertean, retracted 287 



238. everted .... . 287 



239. Transverse section of Nemertean 288 



240. Diagram of anterior end of Nemertean " 289 



241. Pilidium . 290 



242. Ascaris lumbricoides ... . . ... 293 



243. ,, ,, transverse section . . . . 294 



244. ,, muscle fibres 295 



245. ,, dissection of female 296 



246. Nervous system of Nematoda 297 



247. Ascaris lumbricoides, dissection of male organs 297 



248. Body-wall of platymyarian Nematode .... . 300 



249. Dochmius duodenalis 300 



250. Transverse section of Gordius . 301 



251. Oxyuris 302 



252. Gordius, anatomy . . ... 303 



253. Trichinella spiralis ... 305 



254. Two species of Echinorhynehus (Gigantorhynchus) .... 307 



255. Echinorhynchus gigas, dissection of male . . . . . . 308 



256. ,, ,, female . . . 308 



nephridia . . . 309 



258. ,, female organs 309 



259. Egg of Echinorhynchus acus . . . ... 310 



260. Sagitta hexaptera . . .311 



261. ,, liipiinc-tata, transverse sections ..... 312 



262. head . . .312 



263. ,, hexaptera, eye . ........ 312 



264. Development of Sagitta . .313 



265. Chaetosoma . . .313 

 6. Ki'hinodores . 314 



267. Desmoscolex . . . 314 



268. Trochophore . . . 3l(j 



269. Brachionus rubeiis, femali- . 318 



270. pharynx . . . 319 



male and female, with attached eggs . . 319 



272. Diagram of a Rotifer 320 



273. Paraseisoii asplanclmus . . .... :\-2'2 



274. Typical forms of Rotifera . ;;i' i 



275. 395 



