LIST OF ILLUSTRATIONS xxv 



FIG. PAGE 



276. Typical forms of mastax 326 



277. Chaetonotus maximua 329 



278. anatomy 329 



279. Dinophilus tgpniatus 330 



280. Stratiodrilus tasmanicus 331 



281. Bugula avicularia 335 



282. Development of Bugula 337 



283. ., 338 



284. Larva of Bugula 339 



285. Plumatella 342 



286. Cristatella 343 



287. Lophopus 344 



288. Pedicellina . 347 



289. Phoronis australis 348 



290. free end 349 



291. ,, ,, internal organisation 349 



292. section 350 



293. Actinotrocha larva of Phoronis 351 



294. 352 



295. Magellania flavescens, shell . . 354 



296. lenticularis, anatomy 356 



297. ,, flavescens, lophophore 357 



298. ,, muscular system 357 



299. Terebratula, nervous system, &c 358 



300. Typical Brachiopods 360 



301. ,, ' anatomy 361 



3C2. Development of Cistella 363 



303. Larva of Cistella 363 



304. Development of Cistella 364 



305. Lophophore of embryo Brachiopod 365 



306. Diagrams of phylactolsematous Polyzoan and Phoronis . . . 366 



307. Starfish, oral aspect 369 



308. ,, vertical section of arm .371 



309. ,, portion of vertical section of arm 373 



310. ,, diagrammatic sections . . 374 



311. Asterias rubens, digestive system 375 



312. Astropecten, section of stone-canal 375 



313. Anthenea flavescens, dissection from do rsaljispect .... 376 



314. Asterias rubens, structure 377 



315. Anthenea flavescens, lateral dissection 378 



316. aboral surface . 379 



317. oral surface 379 



318. Asterina gibbosa, development . . .381 



319. 382 



320. larva 383 



321. 384 



322. exigua, young after metamorphosis 384 



323. Asterma gibbosa, development . . ...... . . . 385 



