560 



COMPARATIVE ANATOMY 



Rotalia Freyeri, 5 

 Rotatoria, 185 

 Rotifer a, diagram, 185 

 Rugosa, 70 



S A BELL A, 182 

 Sabellaria, 182 



,, alveolata, nervous aiid nephri- 



dial system, 221 

 Saccocirrns, 181 

 Sacculina, 292 



, , carcini, 305 ; development, 386 ; 

 section, 373 ; larval stages, 386 

 ,, externa, 387 

 ,, internet,, 387 

 Sagitta, 185 ; development, 281 ; section, 



197 



,, bipunctata, head of, 227 

 hexaptera, 227 ; eye, 231 



Saltatoria, 439 

 SaMicus, 510 

 Saltigrada, 510 

 Sao, 415 

 Sapphirina, 291 



,, Edioardsii, nervous system, 



346 



Sarcodictyum, 15 

 Sarcodina, 4 

 Sarcolemma, 48 

 Sarcomatrix, 15 

 Sarcophaga carnaria, nervous system, 



466 



Sarcopsylla, 441 

 Sarcoptidce., 510 

 Sarcosepta, 99 

 Sarsia siphonophora, 110 



,, tubulosa, 68 

 Saturnidce, 442 

 Satyridce, 44% 

 Scalpellum, 292 

 Schistocephalus, 134 

 Schizonemertina, 178 

 Schizoneura, 440 

 Schizopoda, 297 ; thoracic feet, 321'; larva, 



392 



Schultzia, 156 

 Scolex, 138, 164 

 Scolopendrella, 438 ; heart, 476 - 



, , immaculata, 444 ; poster- 



ior body, 453 

 Scolopendridce, 438 

 Scolopophore, 471 



Scorpio, embryo, 638 ; nervous system, 

 519 ; digestive tract, 524 : 

 heart, 527 



,, Africanus, 512 



,, occitanus, sexual organs, 633, 



534 



Scorpionidce, 509 

 Scuta, 304 



Scutigera coleoptera, trachse, 479 

 Scutigeridce, 438 



Scyllarus, 298 ; development, 395 



Scyphistoma, 72 



Scyphomedusce, 71 



Scyphopolyp or Scyphula, 70 ; develop- 

 ment, 130 



Scyphozoa, 70 



Sedentaria, 182 



Segestria, 510 



Segmental organs, see Nephridia 



Segmentation, 120-129 ; nucleus, 33 



Seison, 185 



Semostomce, 72 



Sensory body of Ctenophora, 79, 96 



Sergestes, 298 



Serictery, 458 



Serpulidce, 182 



Sertularia, 68 



Sesiadce, 442 



Sialidce, 441 



Sida, 290 



Silphidce, 442 



Siphonantha, 70, 108-114, 109 



Sipkonaptera, 441 



Siphonophora, 69 



Siphonostoma, 182 



Sipunculacea, 183 



Sipunculidce, 183 



Sipunculus, 183 ; anatomy, 208 ; diagram 

 of muscles, 195 ; larva, 270 



Siriella, 297 



,, gracilis, pleopoda, 324 



Thompsonii, pleopoda, 324 



Sitaris, 492 

 Sklerosepta, 99 

 Sminthurus, 439 

 Solenopharynx, 157 

 Solmaris, 69 

 Solpugidce, 509 

 Spadella, 185 

 Sphceromidce, 295 

 Sphcerozoum, 6 

 Sphcerula bombi, 179 

 Sphingina, 44% 

 Spicules, 64 

 Spiculispongice, 61 

 Spionidce, 182 

 Spirifer, 185 

 SpirograpMs, 182 

 Spirostomum, 9 

 Spongelia, 62 

 Spongilla, 61 

 Spongin, 63 

 Spongioplasm, 26, 49 

 Sporocysts, 169 

 Spumellaria, 6 

 Squame, 309 



Squilla, 295, 296 ; thoracic feet of larva, 

 320 ; circulatory system of 

 larva, 363 



,, viantis, genital organs, 375 

 Staphylinidce, 442 

 Statoblasts, 264 

 Stauridium cladonema, 68 



