INDEX 



777 



Streptoneura, (583", 688 



Strobila, 233 



Strongylocentrotus, 364 See Sea-urchin 



Strongylo8toma, 570 



Stylarwides, 447 



Stylaster, 146, 147 



Stylonychia, 90 



Sub-genital pit (Aurelia), 158" 



Sub-genital portico, 171* 



Sub-kingdom See Phylum 



Sub-radius, 129 



Sub-umbrella, 125* 



Succession of Life in time, 7 



Sucker (Sepia), 709*, 710 



Suctorial mouths (Rhizostomee), 170 



Summer eggs, 551 



Supporting lamella See Mesogloea ' 



Swimming-bell See Nectocalyx 



Swimming-plate, 199, 200* 



Sycantha, 103 



Sycetta, 103 



Sycettidce, 103 



SYCOX : External characters, 96, 97 : 



Microscopic structure, 99 : Systematic 



position, 103 : Development, 113, 



114 



Sycon-type of sponge, 109* 

 Syflida, 436, 446, 447 

 Syl/i* ramosa, 446 

 Symmetry, 39*, 40 : Polype and Medusa, 



128 : Tealia, 176, 179 

 Symphyla, 567*, 569 

 Synapta, 390, 399, 402 

 Synapticula, 192* 

 Syn-cerebrum, 513* 

 Syncoryne, 135 

 Syncrypta, 66 

 Syncytium, 99" 



JL ABAS US, 590 



Tabula, 143*, 192 



Tactile organs, 37 



Tfi j nia ('(i')iitritx, 261 



Tcenia crassicolli*, 265 . . 



Tcenia echinococats, 246, 261, 262, 265 



T<xnia mediocanellata, 265 



Tfenia saginata, 265 



Tit-ilia serrata, 265 



>I\KMA SOLIUM : General features, 231, 

 232, 233 : Nervous system, 233 : Ex- 

 cretory organs, 234 : Reproductive 

 organs, 234 : Systematic position, 239 



Tamiole, 161* 



Tutifru*, 543 



Tanai*, 543 



Tape-worm See Ta^nia and Cestoda 



Tardigrada, 626, 629 



TEALIA : P]xternal characters, 172, 173 : 

 Enteric system, 174, 175 : Muscular 



.system, 173, 175 : Symmetry, 176 : 

 Microscopic structure/ 177, 178 : Ner- 

 vous system, 179 : Reproductive 

 organs, 173, 179: Development, 179, 

 180 : Systematic position, 183 



Tectibranchia, 6S4", 7<'"> 



Telolecithal, 2(7* 



Telotrochal, 445* 



Telson, 498* 



Temnocephala, 244, 264 



Temnoctphalw, 244 



Tendon, 35* 



Tentacles, 30* 



Tentaculifera, 82* : Body and tentacles, 

 90: Nucleus, contractile vacuoles, 

 shell, colonies, reproduction, 92 



Tentaculocyst, 143*, 160 



Tentorium, 579 



Terebella, 434 



Terebellidtr, 433 



Terebra, 686 



Terebmtufa, 336, 338, 339 



Terebrtotulidce, 338 



Terebmfii/iitd* 343 



Teredo, 647, 652 



Tergum, 4<)s 



Termites, 585, G< >3 



Terssra, 165 



Tethys, 684 



Tetrabranchiata, 736", 739 



Tetramita, 66 



Tetrarhynchus, 246 



T(ti-<i.temma, 269 



Thalassoplancta, 59 



Theca, 192* 



Thomson, J. Vaughan, 3 



Thorax, of Apu*, 489: A*tacn, 499': 

 Periplanetdk, 572, 574: Solpugida, 615 



Thread- worms See Nemathelminthes 



Thyx'i'nozoon, 240 



Thysanura, 5 S3 



Ticks, 612 See Acarida 



Tiedemann's vesicle, 354*, 393 



Tintinnidinm, 85 



Tissues, 21* 



Tomo2)teri.<<, 447 



Trachea?, 33*, 562, 577, 578, 593 



Trachea! gills, 594* 



TracheliaMes, 531 



Trachelius, 85 



Trachelomonas, 66 



Trachylinae, 132* : General structure, 



142 : Sense organs, 143 : ^Tentacles, 



143 : Reproductive-organs,* 144 : De- 

 velopment, 144 



Trachymedusse, 132*, 142, 143, 144 3 



Trap-door Spider, 623 



Tmpezia, 196 



Trematoda, Example, 226, 238,*, 242, 

 243, 244, 245, 24S, 24U, 250, 251, 252, 

 253, 25*4, 250, 258, 259, 264, 265, 266, 

 267 



