628 



INDEX 



554 ; of Xeolampas, 554 ; of Holothuria 

 nifjra, 560; o't A ntedon rosacea, 582; of 

 Dipleurula larva, 604 ; of Aster ina 

 ffihbosa, 611 



Aphodal, 210 



Aphrothoraca, 70 



Aplaiiospore, 31 



AplysiUa, 196 



Aplysina, 225 



Apocyte, 30, 32 



Apocytial, condition, 32 ; forms among 

 Myxosporidiaceae, 107 f.; Rhizopoda, 52 



Apolemia, SOS 



Apoleminae, 307 



Apopyle, 170 



Aporosa, 397 



Appendicularia, host of Gymnodiniiim 

 indviscuhis, 132 



Aquatic organisms, minute, distribution 

 of, 47 n. 



Arachnactis, 373, 411 ; A. alhidn, 411 ; 

 A. americana, 411 ; A. lloydii, 411 



Aracknoides, 549 



Arbacia, 520, 53S 



Arbaciidae, 530, 531, 532, 53S, 558 



Arbacioid type of ambulacral plate, 531, 

 538 



Arcadomyaria, 324 



Arcella, 51, 53 ; A. vulgaris, 55 



Archaeocidaridae, 557, 558 



Archaeocyte, 171 



Archaster, 467 ; A. hifrons, 467 



Archasteridae, 456, 4*'6 



Archenteron, definition of, 604 



Archer, on Protozoa, 45 ; on Heliozoa, 71 



Archicoel, 450 



ArcuothrLv, 52 ; transition between 

 pseudopodium and flagellum in, 47 n. 



Arenaceous Foraininifera, 5S f. ; Carpen- 

 ter on, 63 f. ; labyrinthine structure 

 in, 66 



Arc/as persica, 121 



Aristocystis, 599, 599 



Aristotle, 166 



Aristotle's lantern, of Echinus esodentus, 

 515, 516, 524, 525 ; variations of, in 

 Endocyclica, 531 ; of Echinarachnius 

 piarma, 546, 547 ; absent in Echino- 

 cardimn cordatnm, 550 



Arm, of Asteroidea, 431, 432, 453 ; of 

 Ophiothrix fragilis, 479 ; of Ophiu- 

 roidea, 481, 491 ; of Grinoidea, 580, 

 589 ; of A ntedon rosacea, 581 ; of 

 Antedon (other species), 594 ; of Hyo- 

 crimis, 590 ; of Rhizocrinus, 591 ; of 

 Bathycrinus, 591 ; of Pentacrinidac, 

 592; of Holopus, 594 ; of Eiidinrrinx:^, 



594 ; of Inadunata, 595 ; of Articulata, 



595 ; of Camerata, 595 ; development 

 of, in Asterina gibbosa, 611 ; in Antedon 

 rosacea, 620 



Arm-spines, of Ophiothrix fragilis, 479 ; 



of Ophiuroidea, 491 ; of Ophiothru:, 492 ; 

 of Ophiacantha, 492 ; of Ophiopteron, 

 492 



Aromatic compounds in relation to 

 nutrition and antisepsis, 36 



Arthropods, hosts of Gregariues, 97 f. 



Articulata, 595 



Ascitic dropsy, Leydenia associated -with, 

 91 



Ascon, 185 



Asconema setubalense, 221 



Asexual reproduction of Asteroidea, 459 ; 

 of Linckia, 459 ; of Asterina wega, 459 



Ashworth, 331 u. 



Asiphonacea, 3^7 



Asphyxia, its ett'ect ou contractile vacu- 

 ole, 143 



Aspidochirota, 568, 569, 570 f., 577, 578 



Aspidnsoma, 476 



Aspirotrichaceae, 137, 148, 151, 153, 154 



Assimilation, assimilative anabolism, 

 growth, 9, 13, 15 f. 



Association, in Gregarines, 95, 98 f. ; in 

 Lankesteria ascidiae, 95 f. 



Astasia, 110, 112 



Aster ( = centrosome of mitotically dividing 

 cell and peripheral rays), 25, 27 ; (a 

 polyaxouid spicule), 184 



Aster ias, ^7-?, 475 ; A. rubens, 432 ; 

 external features, 432 ; pedicellariae, 

 433 ; skeleton, 434 ; coelom, 437 ; 

 alimentary canal, 438 ; food, 439 ; 

 water - vascular system, 441 ; nervous 

 system, 444 ; perihaemal spaces, 448 ; 

 blood - system, 449 ; genital organs, 

 451 ; A. glacialis, 473 ; pedicellariae, 

 434; .1. hispida, 474; A. micelleri, 

 473 ; .1. vmrrayi, 473 ; A. ochracea, 

 474; A. 2Mlaris, 474; .1. sjnrabilis, 

 601, 602 ; A. tenuispina, 453 



Asteriidae, 453, 458, 473 



Asterina, 454, 456, 459, 461, 463; A. 

 gibbosa, number of arms, 453 ; eggs of, 

 463 ; development of, 609, 610 f., 617 ; 

 A. wega, 459 



Asterinidae, 455, 458, v^6'.5 



Asternata, 554 



Asteroid stage in the development of 

 Ophiuroidea and Echinoidea, 613, 622 



Asteroidea, 430, 431 f. ; compared with 

 Ophiuroidea, 477 f. ; compared with 

 Echinoidea, 503, 558 ; mesencliyme of 

 larva of, 602 ; development of, 605, 

 608, 609, 610 f. ; phylogeny of, 621 



Asteropsis, 471 



Asterosmilia, 40 1 



Asthenosovia, 536; A. hystrix. 536, 537 ; 

 A. urens, 536 



Astraeidae, 387, 399 



Aslracopora, 390 



Astrungld, 41111; A. solitaria, 374, 400 



Astrocnida, 501 



