LIST OF ILLUSTRATIONS 



XXV 



FIG- PAGE 



276. Typical forms of mastax . . . . 326 



277. Chsetonotus maximus . 329 



278. ,, anatomy . 329 



279. Dinophilus tseniatus . . 330 



280. Strati odrilus 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 



302. 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 dorsal aspect . .376 



314. Asterias rubens, structure ... . 377 



315. Anthenea flavescens, lateral dissection ...... 378 



316. .. .. aboral surface . . . 379 



317. .. .. oral surf ace . .... 379 



318. Asterina gibbosa, development . 381 



319. .. ..... . 382 



320. .. ., a 383 



321. 384 



322. ,, exigua, young after metamorphosis . . . . 384 



323. Asteriua gibbosa, development .... ... 385 



