Ranatra, 363 
Redia, 109 
Reduviidae, 363 
Reduvius, 364 
Regulares, 243, 245 
Reptantia, 203 
Reticularia, 12, 13, 20 
Retinia, 352 
Rhabdites, 82, 83 
Rhabditis, 129 
Rhabdocoela, 81, 83, 89, 94 
Rhabdopleura, 424, 433 
Rhabdopleurida, 432 
Rhaphidiophrys, 18 
Rhinodrilus, 145 
Rhizocephala, 278, 298 
Rhizocrinus, 239 
Rhizopoda, 5 
Rhizostoma, 63 
Rhodites, 379 
Rhodope, 207 
Rhopalocera, 354 
Rhynchoflagellata, 25 
Rhynchonella, 176, 177 
Rhyncobdellidae, 132, 187 
Rhyncodemus, 81, 95 
Rhyssa, 380 
Rotalia, 15 
Rotifera, 183 
SSABELLA, 156 
Sabellidae, 156 
Saccammina, 12 
Saceuli, 237 
Sacculina, 278 
Sagartia, 65, 67 
Salpidae, 449 
Saltatoria, 337 
Saperda, 361 
Sarcopsylla, 372 
Sarcoptes, 421 
Sarcoptidae, 420 
Scape, 322 
Scapellum, 273, 277 
Scaphognathite, 287 
Scaphopoda, 209 
Scarabeidae, 358 
Schizocoel, 78 
Schizonemertine, 120 
Schizopoda, 282, 285 
Sclerotium, 9 
Scolex, 101, 105 
Scolopendra, 311, 314 
Scolopendrella, 318, 333, 
335 
Seolytidae, 360 
Scorpio, 395 
Scorpionida, 395 
Scuta, 273 
Scutellum, 356 
INDEX 
457 
Seutigera, 313, 315 
Scyphistoma, 60, 61, 63 
Scyphomedusae, 47, 60, 63 
Sedentaria, 150, 156, 157 
Sepia, 211 
Septa, 69 
Serpula, 157 
Serpulidae, 155, 156, 157 
Sertularidae, 56 
Sesia, 354 
Shell gland, 257, 262, 265, 
268, 274, 281 
Sida, 257 
Siphonoglyph, 65,71,73,74 
Siphonophora (a Myria- 
pod), 317 
Siphonophora, 58 
Siphonozoids, 73 
Siphuncle, 222 
Sipunculus, 165 
Sirex, 377, 380 
Siriella, 285 
Sminthurinae, 333, 334 
Sminthurus, 333 
Solaster, 230, 232 
Solen, 192, 193 
Solenobia, 352 
Solifuga, 406 
Sori, 7 
Spatangoidea, 245 
Spermospores, 56, 58 
Sphaerogyna, 420 
Sphaeromidae, 297 
Sphaerophrya, 32 
Sphex, 386 
Sphingidae, 351 
Sphingina, 354 
Sphinx, 354, 380 
Spiculispongiae, 44 
Spirogyra, 6 
Spirula, 6, 213, 222 
Spondylus, 195, 208 
Sponges, 24, 37, 259 
Spongilla, 44, 45, 183 
Spongillidae, 37, 43 
Spongin, 41 
Sporocyst, 9, 23, 109 
Sporosaes, 59 
Sporozoa, 33 
Squama, 370 
Squilla, 282 
Staphylinidae, 356, 358 
Statoblasts, 183, 259 
Stelechopus, 240 
Stelleta, 41 
Stelospongus, 39 
Stenostoma, 90 
Stentor, 27 
Sternaspis, 168 
Stipes, 323 
Stomatopoda, 282 
Stomodaeum, 63, 72, 78, 
279 
Streptoneura, 197 
Strobila, 61 
Strobilisation, 101 
Sturgeon, 104, 105 
Stylasteridae, 57 
Subimago, 345 
Submentum, 323 
Subneural gland, 441 
Succined, 112, 113 
Sycandra, 43 
Sycon, 44 
Syllidae, 156, 158 
Symphyla, 318 
Synagoga, 278 
Synapta, 204, 246, 251 
Syrphidae, 374 
Syrphus, 374 
TABANIDAE, 373 
Tabanus, 373 
Tabulae, 72 
Tachinidae, 375 
Tuenia, 95, 96, 98, 105 
Taeniolae, 60, 61, 64 
Talitrus, 292 
Tanais, 290, 297 
Tarsus, 324 
Tealia, 66 
Tegenaria, 412, 413, 415, 
416 
Tegulae, 376 
Tenebrio, 359 
Tenebrionidae, 359 
Tentaculifera, 210 
Tentaculocysts, 59 
Tenthredinidae, 377 
Terebella, 155, 157 
Terebellidae, 158 
Terebratula, 176 
Teredo, 191 
Terga, 273 
Termes, 342 
Termitidae, 342 
Terricolae, 144 
Testacea, 10 
Testicardines, 176, 178 
Tethys, 206 
Tetilla, 45 
Tetrabranchiata, 211 
Tetractinellidae, 45 
Tetranyneus, 421 
Tetrapneumones, 415 
Tetrarhyncus, 105 
Tetrastemma, 115, 122 
Thalassema, 166, 167, 168 
Thaliacea, 448 
Theca, 69 
