836 



INDEX 



Ambulacral system, .S8S : Reproduc- 

 tive sj'stem 386 : Development, 3SS, 

 389, 390, 391, 392, 393 : Systematic 

 position, 414 



Starfishes, 374— See Asteroidea 



Stauromedusae, 176*, 177, IIS, 2iZ7 



Stenrxyjihiif, 17M 



Slenlor, 9:2, 94 



Stephanortrox, 328, 330, 331 



Steni((.-<pi.-<, 469, 471, 47r), 477, 481 



Sfe7'na^pi'^ spinosa. 471 



Sternum, 541* 



Stewart's organs, 4'2."i' 



Stichopoda , 415 



Stichotricha, 95 



Stick-insects, 633, 636 



Stigma (Euglena), 68 



Stigmata, 609, 623, 642, 655 



Stinging capsule — See Nematocyst 



Stolon, 196* 



Stomach — See Digestive system 



Stoniatogastric nerves, 447 



Stomatopoda, 569*, 592, 593, 596 



Stomidium, 201* 



Stomodieal canal, 213 



StomodiBum, 173* 



Stone-canal, 383*, 399 



Stony-corals, 128, 195 202 



Sfrrilioilrl/ii.s tasmanirns, 338 



Strepsiptera, 640, 651, 



Streptophiurse, 411" 



Streptoneura, 733*, 735, 736, 739, 742, 

 744, 745, 746, 748, 750, 755 



Siricholrirhn, 95 



Strol.ila, 246*, 247, 262 



StroiKji/lornitrotii^, 393, 395, 397, 414 — 

 See Sea-urchin 



Strongylo^tohia, 615 



Slro)i(ji//ii-:, 305 



S/i/larioirlt'.^^ 488 



Siylaster, 157, 158, 159 



Style, 158* 



Slylonychin, 99 



Subcortical cavity of sponges, 119' 



Subdermal cavitj' of sponges, 118, 119 



Sub-genital pit (Aurelia), 170* 



Sub-genital portico, 183" 



Sub-kingdom — See Phylum 



Sub mentum, 622 



Sub-radius, 139* 



Sub-tentacular canal, 407 



Sub-umbrella, 135* 



Succession of Life in time, 7 



Sucker (Sepia), 760* 



Sucking-disc, 417 



Suctorial mouths (Rhizostoma;), 183 : 

 Discomedus;e, 183 



Summer eggs, 597 



Supplemental skeleton, 53, 54* 



Supporting lamella — See Jlesoglcya 



Swimming- Ijell — See Nectocalyx 



Swimming ovaries, 315 



Swimming-plate, 213* 



Si/riDilhn, 113 



S'ya-ll'i, 113 



S,/n-Hi(/ii'; 113*, 172 



SvcoN : External characters, 105, 106, 

 107 : Jlicroscopic structure, 108, 109 i 

 Systematic position, 112: Develop- 

 ment, 124, 125 



Sycoii- riiphaiiuif. 125 



Syc()ii-t\-pc of sponge, 117, 118"' 



Sy/Hda,' iir>, 487, 488 



Syl/i-^ rdmo.'ilt. 487 



Symbiosis, 63" 



Sjnnnetrv, 41*, 43': Polype and .Medusa, 

 ■ 138 : Tealia, 189, 192 



Symphyla, 615*, 617, 619, 677 



Si/iinptd, 424, 434, 438 



Synajitiihr, 429 



Sj'napticula, 205* 



Syncarida, 566*, 581 



Syn-cerebrum, 555*, 631 



Syncoryne, 145 



Syiu'i-yDta, 71 



Syncytium, 298* 



Syngnatha, 615", 616, 617, 618 



T 



± Aisjsij.-^^ 638, 644 



Tabula, 157" , 205, 208 



Tactile cones, 2(iO ', 268 



Tactile organs, 39 



Tii'iiia rn'iiurnn, 252 



T(i')ua cras'.s-fro///^, 285 



Tii'nUt riiciimerhuf., 270 



T'l'iiiftdir^ 254 



Ticnia erhiiwrocciis, 261, 262, 282, 286 



Tii'iiia 7iiediuL'riiieUata, 285 



Tii'irid sagiitalK, 285 



Tii'ma serialis, 282 



T'l'iiki serrfiffi, 285 



T.HNIA SOLIUM, C4eneral features, 245, 

 246, 247 • Nervous system, 248 : 

 Excretory organs, 248 : Reproductive 

 organs, 248, 249, 250 : Development, 

 250, 251 : Systematic position, 254 



Ta?niole, 173* 



Ta/ifnis, 583 



Tanaidacea, 567*, 583, 584, 585, 603 



Tiamix, 567, 5S3 



Tape-worm — See T;unia and Cestoda 



Tardigrada, 673, 675*, 678 



Tealia : External characters, 185, 186 : 

 Enteric system, 187, 188, Cell layers, 

 188 : Muscular system, 186, 188 : Sym- 

 metry, 189 : ilicroscopic structure, 

 190, 191 ; Nervous system, 192 : Re- 

 productive organs, 193 : Development, 

 192, 193 ; Systematic position, 196 



