INDEX 



665 



Stalk or stem, of Olathrulina, 74 ; of 

 Flagellates, 112 f. ; of Anthophysa, 

 112 ; of Diplomita, 112 ; of Choano- 

 flagellates, 121, 122 ; of Monosiga, 

 122 ; of Polyoeca, 113, 122 ; of Peritri- 

 chaceae, 141 n. ; of Schizotricha socialis, 

 152 ; of Vorticella, 157 ; of Carchesium, 

 158 ; of Epistylis, 158 ; of Zootham- 

 nium, 158 ; of Suctoria, 159, 160, 162 ; 

 of Pelmatozoa, 430, 579 ; of Criiioidea, 

 580 ; of Carpoldea, 580, 696 ; of Cys- 

 toidea, 580, 597 ; of Blastoidea, 580, 

 599 ; of Antedon rosacea, 581, 585 ; of 

 Actinometra, 588 ; of Rliizocrinidae, 588, 

 590 ; of Eolopus, 588, 592 ; of Hyo- 

 crinus, 588, 590 ; of Pentacrinidae, 588, 

 591, 592 ; of larva of Asterina gibbosa, 

 610 ; of Brachlolaria, 612 ; of larva of 

 Antedon rosacea, 619 ; of ancestral 

 Crinoidea, 600 ; of ancestral Eohinoder- 

 mata, 621 



Starch, 15, 37 ; in Zooxanfhella, 86 ; in 

 Flagellata, 110, 115 



Starfish = Asteroidea, q.v. 



Stationary pairing-nucleus, 150 



Statocysts, 252, 288 



Statolith, 252, 289 



Statoplea, 279 



Statorhah in Geryonia, 252 



Stauractin, 234 

 - Stauromedusae, 310, 316, 320 



Steganophthalmata, 314 



Steganopwa, 284, 28S 



Stein, von, on Protozoa, 45 f. ; misinterpre- 

 tation of parasitic Suctoria in Ciliata, 

 161 ; on Suctoria, 162 



Stelechotokea, 347 



StelUtta, 213, 214, 222 



Stem — see Stalk 



Stem-ossicles, of Pentacrinidae, 588, 591 ; 

 of Hyocrinus, 588, 590 ; of Rhizocrinidae, 

 588, 590 ; of larva of Antedon rosacea, 

 619 



Stenoscyphidae, 321 



Stenoscyphus inabai, 321 



Stentor, 137, 154 ; regeneration, 35 ; 

 supposed nervous fibrils, 143 ; mega- 

 nucleus, 144 ; conjugation, 149 ; attach- 

 ment, 152 ; ,S. coerukus, 154 ; S. igneus, 

 154; S. polymorphus, young, and adult 

 in fission, 156 



Stentorin, blue, 154 n. 



StepMnophyes, 300, 307 ; S. superba, 



307 

 Stephanophyinae, 307 

 StephanophyUia, 404 

 Stephanoscyphus, 318 ; S. mirabilis, 206 

 Stephanosphaera, 111, 128 

 Stephoidea, 78 f. 

 Stereoplasm, 394 

 Stereosoma, 331, 334, 337, 344 



Stereotaxy, 20 



Sterilisation of colonial cells in Volvox, 

 129 



Sternata, 554 



Sternum = Plastron, g.v. 



Sterraster (an aster with very numerous 

 actines soldered together by subsequently 

 deposited silica, which extends almost 

 to their extremities), 224 



Sterrula, 341 



Stewart's organs, of Cidaridae, 531 ; of 

 Echinothuriidae, 531 ; of Arbaciidae, 

 531, 539 ; of Diadematidae, 538 



Stichaster, 474 



Stichasteridae, 456, 4^4 



Stichodactylina, 380, 383 



Sticholonclie, 86 ; host of Amoebophrya, 

 161 



Stichopathes, 407, 4O8 



Stichopus, 570 



Stichotricha, 138 



Sticklebacks, prey on Anopheles, 106 



Stimuli, 8 f. ; inducing responsive move- 

 ments, 19 f. 



Stoichactis kenti, 378, 383 



Stole, on Peloinyxa, 53 n. 



Stolon, 301 



Stolonifera, 34^ 



Stomach, present in Metazoa, 38 ; of gnats, 

 seat of syngamy of Acystosporidae, 103, 

 104 f. ; of Asterias rubens, 438 ; of 

 Echinus esculentus, 516 ; of Holothuria 

 nigra, 562 ; of Antedon rosacea, 583 ; 

 of Dipleurula, 605 ; absent in Hyocrinus, 

 589 



Stomatoca (Tiaridae, ^73), 415 



Stomatograptus, 282 



Stomodaeum, of Anthozoa, 327 ; of Cteno- 

 phora, 415 ; of Echinus esculentus, 516 ; 

 of Dipleurula, 605 ; of metamorphosing 

 Auricularia, 615 ; of larva of Antedon, 

 619 



Stony Corals, 326 



Strain-figure of cell dividing by mitosis, 



25, 26, 27 

 Strained condition of cytoplasm during 



syngamy, 34 

 Streaming of granules in protoplasm, 17 

 Streptocaulus, 277 

 Streptophiurae, 491, 494, 500, 502 

 Strobila, 317 

 Stromacystis, 596 

 Stromatopora, 283 

 Stromatoporidae, 283 

 StromMdium (Torguatella), 137, 155 n. 

 Strongyle, 183, 224 

 Strongylocentrotus, 512, 522, 533, 540 ; 



S. droebachiensis, 512, 523, 541 ; S. 



liiiidus, 541 ; S. purpuratus, 542 

 Stryphnus ponderosus, 222 

 Studer, 340 



