xxii LIST OF ILLUSTRATIONS 



VI i ; PAttE 



231. Oxyuris 285 



232. Gordius, anatomy . . . . 286 



233. Development of Ascaris nigrovenosa . . . 287 



234. Trichina spiralis . 288 



235. Two species of Echinorhynchus . . . 290 



236. Echinorhynchus gigas, dissection of male . . 291 



237. ,, ,, ,, female . . 291 

 1238. ,, ,, female organs . . 292 



239. Sagitta hexaptera . 293 



240. ,, bipunctata, transverse sections . . . 294 



241. ,, head . . 294 



242. ,, hexaptera, eye . . 295 



243. Development of Sagitta . . . 295 



244. A trochosphere . . . 298 



245. Brachionus rubens, female . . . 300 

 241). ,, ., pharynx . . .301 



247. ,, ,, male and female, with attached eggs . . 302 



248. Diagram of a Rotifer ... .303 



249. Typical forms of Rotifera . 305 

 250 ,, . 307 



251. ,, ,, mastax . . 308 



252. Dinophilus gyrociliatus . ... 310 



253. ChiL'tonotus maximus . . . . 311 



254. ,, ,, anatomy . 311 



255. Bugula avicularia . . . 315 



256. Development of Bugula . . 317 



257. ,, - 318 



258. Plumatella . . 322 

 258 b is. Cristatella . . 323 



259. Lophopus . 324 



260. Pedicellina . 327 



261. Phoronis australis .... ... . 328 



262. .. ., free end . . :52!> 



263. ,, ,, internal organisation ... . 329 



264. ,, ,, development .... . 330 



265. Magellania flavescens, shell . . 332 



266. ., , lenticularis, anatomy .... . 334 



267. ,, navescens, lophophore . 335 



26S. ,, muscular system . .... . 335 



269. Terebratula, nervous system, &c. ... . 336 



270. Typical Brachiopods . . . . 339 



271. ,, ,, anatomy . 340 



_'72. Development of Cistella . . 341 



27:;. 342 



-74. Lophophore of embryo Brachiopod . . 343 



275. Diagrams of phylactolaematous Polyzoons . . . 344 



276. Starfish, ventral aspect .... . . 347 



277. ,, vertical section of arm ... . 349 



278. ,, ambulacral system ... 350 



