628 



INDEX 



654 ; of Neolampas, 554 ; of Holothuria 

 nigra, 560; of Antedon rosacea, 582 ; of 

 Dipleurula larva, 604 ; of Asterina 

 gibbosa, 611 



Aphodal, 210 



Aptirothoraca, 70 



Aplanospore, 31 



AplysiUa, 196 



Aplysina, 225 



Apocyte, 30, 32 



Apocytial, condition, 32 ; forms among 

 Myxosporidiaceae, 107 f. ; Rhizopoda, 52 



Apolemia, SOS 



Apolemiuae, 307 



Apopyle, 170 



Aporosa, 397 



Appendictdaria, host of Gymnodiiiiam 

 pulviscidus, 132 



Aquatic organisms, minute, distribution 

 of, 47 n. 



Arachnactis, 373, JfH ; -i- albida, 411 ; 

 A. americana, 411 ; A. lloydii, 411 



Arachnoides, 549 



Arbacia, 520, S3S 



Arbaciidae, 530, 531, 532, S3S, 558 



Arbacioid type of ambulacra?! plate, 531, 

 538 



Arcadomyaria, S34 



Arcella, 61, 53 ; ^. vulgaris, 55 



Archaeocidaridae, 557, 558 



Archaeocyte, 171 



Archaster, 467 ; A. bifrons, 467 



Archasteridae, 456, 4^G 



Arcbenteron, definition of, 604 



Archer, on Protozoa, 45 ; on Heliozoa, 71 



Archicoel, 450 



Arcuothrix, 52 ; transition between 

 pseudopodium and flageUum. in, 47 n. 



Arenaceous Foraniinifera, 58 f. ; Carpen- 

 ter on, 63 f. ; labyrinthine structure 

 in, 66 



Argas persica, 121 



Aristocystis, 599, 599 



Aristotle, 166 



Aristotle's lantern, of Mchinus esculentus, 

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

 Endocyclica, 531 ; of Echinarachnms 

 parma, 546, 547 ; absent in Eehino- 

 cardium cordatum, 550 



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

 Ophiothrix fragiiis, 479 ; of Ophiu- 

 roidea, 481, 491 ; of Crinoidea, 580, 

 589 ; of Antedon rosacea, 681 ; of 

 Antedon (other species), 594 ; of Hyo- 

 crinus, 590 ; of Rhizocrinus, 591 ; of 

 Bathycrinus, 591 ; of Pentaorinidae, 

 592 ; of Holopus, 594 ; of Eudiocrinus, 



594 ; of Inadunata, 595 ; of Articulata, 



595 ; of Camerata, 595 ; development 

 of, in Asterina gibbosa, 611 ; in Antedon 

 rosacea, 620 



Arm-spines, . of Ophiothrix fragiiis, 479 ; 



of Ophinroidea, 491; oi Ophiothrix, 492 ; 



of Ophiacantha, 492 ; of Ophioptercn, 



492 

 Aromatic compounds in relation to 



nutrition and antisepsis, 36 

 Arthropods, hosts of Gregarines, 97 f. 

 Articulata, 595 

 Ascitic dropsy, Leydenia associated witli, 



91 

 Ascon, 185 



Asconema setubalense, 221 

 Asexual reproduction of Asteroidea, 459 ; 



of Linckia, 459 ; of Asterina wega, 459 

 Ashworth, 331 n. 

 Asiphonacea, 347 



Asphyxia, its effect on contractile vacu- 

 ole, 143 

 Aspidochirota, 568, 569, 570 f., 677, 578 

 Aspidosoma, 476 



Aspirotrichaceae, 137, 148, 151, 153, 154 

 Assimilation, assimilative anabolism, 



growth, 9, 13, 15 f. 

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



Lankesteria ascidiae, 95 f. 

 Astasia, 110, 112 

 Aster ( = centrosome of mitotically dividing 



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



polyaxonid spicule), 184 

 Asterias, 473, 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 ; A. hispida, 474 ; A. muelleri, 



473 ; A. niunayi, 473 ; A. ochracea, 



474 ; A. polaris, 474 ; A. spirahilis, 

 601, 602 ; A. temdspina, 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. loega, 459 



Asterinidae, 455, 458, 463 



Asternata, 564 



Asteroid stage in the development of 

 Ophinroidea and Bchinoidea, 613, 622 



Asteroidea, 4^0, 4^1 f. ; compared with 

 Ophiuroidea, 477 f. ; compared with 

 Echinoidea, 603, 558 ; mesenchyme of 

 larva of, 602 ; development of, 605, 

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



Asteropsis, 471 



Asterosmilia, 4OI 



Asthenosoma, 536 ; A. hystrix, 536, 537 ; 

 A, urens, 536 



Astraeidae, 387, 399 



Astraeopora, 390 



Astrangia, 400; A. solitaria, 374, 400 



Astrocnida, 501 



