836 



INDEX 



Ambulacral system, 383 : Reproduc- 

 tive system 386 : Development, 388, 

 389, 390, 391, 392, 393 : Systematic 

 position, 414 



Starfishes, 374 See Asteroidea 



Stauromedusse, 176*, 177, 178, 227 



StenocyphuLs, 178 



Stentor, 92, 94 



Stephanoceros, 328, 330, 331 



Sternaspix, 469, 471, 475, 477, 481 



Sternaspis spinosa, 471 



Sternum, 541" 



Stewart's organs, 425" 



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 



Stomatogastric nerves, 447 



Stomatopoda, 569*, 592, 593, 596 



Stomidium, 201* 



Stomodseal canal, 213 



Stomodseum, 173* 



Stone-canal, 383*, 399 



Stony-corals, 128, 195 202 



Stratiodrilus tasmanicus, 338 



Strepsiptera, 640, 651, 



Streptophiurae, 411* 



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

 744, 745, 746, 748, 750, 755 



Stricholricha, 95 



Strobila, 246*, 247, 262 



Strongylocentrotus, 393, 395, 397, 414 

 See Sea-urchin 



Strongylostoma, 615 



Strongylus, 305 



Stylarioides, 488 



Stylaster, 157, 158, 159 



Style, 158* 



Stylonychia, 99 



Subcortical cavity of sponges, 119* 



Subdermal cavity 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* 



Suck ing- disc, 417 



Suctorial mouths (Rhizostoma,-), 183 : 



Discerned usse, 183 

 Summer eggs, 597 

 Supplemental skeleton, 53, 54* 

 Supporting lamella See Mesoglu-u 

 Swimming- bell See Nectocalyx 

 Swimming ovaries, 315 



Swimming-plate, 213* 



Sycantha, 113 



Sycetta, 113 



Sycettidce, 113*, 172 



SYCONT : External characters, 105, 106, 

 107 : Microscopic structure, 108, 109 : 

 Systematic position, 112: Develop- 

 ment, 124, 125 



tfycon raphanus, 125 



Sycon-type of sponge, 117, 118* 



Syllida,tf5, 487, 488 



Syllis ramoxa, 487 



Symbiosis, 63* 



Symmetry, 41*, 42: Polype and Medusa, 

 138 : Tealia, 189, 192 



Symphyla, 615*, 617, 619, 677 



Synapta, 424, 434, 438 



Synaptidte, 429 



Synapticula, 205* 



Syncarida, 566*, 581 



Syn-cerebrum, 555*, 631 



Syncoryne, 145 



Syncryvta, 71 



Syncytium, 298* 



Syngnatha, 615*, 616, 617, 618 



T 



1_ ABANUS, 638, 644 



Tabula, 157*, 205, 208 



Tactile cones, 260*, 268 



Tactile organs, 39 



T<.mia ccenurus, 252 



Tffnict crassicollis, 285 



Ttxnia cncumerina, 270 



Tceniadcc, 254 



Tmnia echinococcm, 261, 262, 282, 286 



Tmiia mediocanellata, 285 



Twnia saginata, 285 



Ttenia serialis, 282 



Tcvnia serrata, 285 



T^NIA SOLIUM, General features, 245, 



246, 247 : Nervous system, 248 : 



Excretory organs, 248 : Reproductive 



organs, 248, 249, 250 : Development, 



250, 251 : Systematic position, 254 



Ta?niole, 173* 



Tatitrus, 583 



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



Tanai.y, 567, 583 



Tape-worm See Tasnia 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 : Microscopic structure, 

 190, 191 : Nervous system, 192 : Re- 

 productive organs, 193 : Development, 

 192, 193 : Systematic position, 196 



