xxii LIST OF ILLUSTRATIONS 



FI<;. l'A ; K 



231. Oxyuris .285 



232. Gordius, anatomy . 286 



233. Development of Ascaris nigrovenosa . 287 



234. Trichina spiralis . 



235. Two species of Echinorhynchus .... ... 290 



236. Echinorhynchus gigas, dissection of male 291 



237. ,, ,, ,, female 291 



238. ,, ,, 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 



246. ., ,, 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. Chpetonotus maximus .... 31] 



254. ,, ,, anatomy 311 



255. Bugula avicularia 315 



256. Development of Bugula 317 



257. 318 



258. Plumatella 322 



258/>/'.s. (Yistatella 323 



259. Lophopus 324 



260. Pedicellina 327 



261. Phoroiiis australis . 328 



262. ., ,, free end 329 



263. ., ,, internal organisation .'529 



204. ,, ,, development 330 



205. Magellania navescens, shell 332 



200. ,, leiiticularis, anatomy 334 



267. ,, navescens, lophophore 335 



20.S. ,, muscular system 335 



20!>. Terebratula, nervous system, &c . 336 



270. Typical Brachiopods 339 



271. ,, ,, anatomy -. . . . 340 



272. Development of Cistella 341 



27:;. 34L> 



274. Lophophore of embryo Brachiopod . 343 



2~'~>. Diagrams of phylactol;ematous Polyzoons 344 



270. Starfish, ventral aspect 347 



277. ,, vertical section of arm 349 



278. ,, ambulacra! system 350 



