Rhabditis, 129 

 Rhabdocoela, 81, 83, 89, 94 

 Rhabdopleura, 424, 433 

 Ehabdopleurida, 432 

 Rhaphidiophrys, 18 

 RhinodrUus, 145 

 Rhizooephala, 278, 298 

 Rhizocrinua, 239 

 Ehizopoda, 5 

 Rhizostoma, 63 

 Rhodites, 379 

 Rhodope, 207 

 Rhopalooera, 354 

 EhynchoflageUata, 25 

 Rhynclwndla, 176, 177 

 Rhyncobdellidae, 132, 137 

 Rhyncodemus, 81, 95 

 Rhyssa, 380 

 Rotcdia, 15 

 Rotifera, 183 



Sabella, 156 

 Sabellidae, 156 

 Saccammina, 12 

 Sacouli, 237 

 Saccvlina, 278 

 Sagwrtia, 65, 67 

 Salpidae, 449 

 Saltatoria, 337 

 Saperda, 361 

 Sarcopsylla, 372 

 Sareoptes, 421 

 Sarooptidae, 420 

 Scape, 322 

 Scapdlum, 273, 277 

 Scaphognathite, 287 

 Scaphopoda, 209 

 Scarabeidae, 358 

 Sohizocoel, 78 

 Scbizonemertme, 120 

 Sohizopoda, 282, 285 

 Sclerotium, 9 

 Scolex, 101, 105 

 ScolopeTidra, 311, 314 

 Scolopendrdla, 318, 333, 



335 

 Soolytidae, 360 

 Scorpio, 395 

 Soorpionida, 395 

 Scuta, 273 

 Soutellum, 356 



Sesia, 354 



Shell gland, 257, 262, 265, 



268, 274, 281 

 Sida, 257 



Slplionoglypli,65,71, 73,74 

 Siphonophora (a Myria- 



pod), 317 

 Slphonopliora, 58 

 Siplionozoids, 73 

 Slphunole, 222 

 Sipunculus, 165. 

 Sirex, 377, 380 

 Svridla, 285 

 Smmthurinae, 333, 334 

 Sminthurus, 333 

 Solaster, 230, 232 

 Solen, 192, 193 

 Solendbia, 352 

 Solituga, 406 

 Sorl, 7 



Spatangoidea, 245 

 Spermospores, 56, 58 

 Sphaerogyna, 420 

 Spbaeromidae, 297 

 Sphaerophrya, 32 

 Sphex, 386 

 Sphingidae, 351 

 Sphingina, 354 

 SpUiix, 354, 380 

 Spiculisponglae, 44 



Spirvla, 6, 213, 222 

 Spondylus, 195, 208 

 Sponges, 24, 37, 259 

 Spongilla, 44, 45, 183 

 Spongillidae, 37, 43 

 Spongin, 41 

 Sporocyst, 9, 23, 109 

 Sporosacs, 59 

 Sporozoa, 33 

 Squama, 370 

 SquUla, 282 

 Staphylinidae, 356, 358 

 Statoblasts, 183, 259 

 Stdechopus, 240 

 Stdleta, 41 

 Stelospongus, 39 

 Stenostoma, 90 

 Stentor, 27 

 Stemaspis, 168 

 Stipes, 323 



Submentum, 323 

 Subneural gland, 441 

 Succinea, 112, 113 

 Sycandra, 43 

 Sycon, 44 

 Syllidae, 156, 158 

 Symphyla, 318 

 SyTiagoga, 278 

 Synapta, 204, 246, 251 

 Syrphldae, 374 

 Syrphibs, 374 



Tabanidae, 373 

 Tabanus, 373 

 Tabulae, 72 

 Tachinidae, 375 

 Taenia, 95, 96, 98, 105 

 Taeniolae, 60, 61, 64 

 Talitrus, 292 

 Tanais, 290, 297 

 Tarsus, 324 

 Tecdia, 66 

 Tegenaria, 412, 413, 415, 



416 

 Tegulae, 376 

 Tenebrio, 359 

 Tenebrionldae, 359 

 Tentaculifera, 210 

 Tentaculocysts, 59 

 Tenthredinidae, 377 

 Terebdla, 155, 157 

 Terebellidae, 158 

 Terd>rcUida, 176 

 Teredo, 191 

 Terga, 273 

 Termes, 342 

 Termltidae, 342 

 Terricolae, 144 

 Testaoea, 10 

 Testicardines, 176, 178 

 Tethys, 206 

 Tetilla, 45 



Tetrabrancbiata, 211 

 Tetractlnellidae, 45 

 Tetranyncus, 421 

 Tetrapneumones, 415 

 Tetrarhyncws, 105 

 Tdrastemma, 115, 122 

 Thalassema, 166, 167, 168 

 Thaliacea, 448 

 Theca, 69 



