560 



COMPARA TIVE ANA TOMY 



Rotalia Fret/i'/-/', 5 

 Rotatoria, 185 

 Rotifera, diagram, 185 

 Ri/gosa, 70 



SABELLA, 182 

 Sabellaria, 182 



,, alveolata, nervous and nephri- 



dial system, 221 

 Saccocimis, 1S1 

 Sacculina, 2'J.l 



,, carcini, 305 ; development, 386; 

 section, 373 ; larval stages, 386 

 ,, externa, 387 

 ,, interna, 387 

 Sagitta, 185 ; development, 281 ; section, 



197 



,, bipunctata, head of, 227 

 ,, hexaptera, 227; eye, 231 

 Salpingoeca, 8 

 SuUutoria, 439 

 Salticus, 510 

 Saltigrada, 510 

 S'rto, 415 



291 



Edioardsii, nervous system, 



346 



Sarcodictyum, 15 

 Sarcodina, 4 

 Sarcolemma, 48 

 Sarcomatrix, 15 

 ' Sarcophaya carnaria, nervous system, 



466 



SarcopsyUa, 44-1 

 Sarcoptidce, 510 

 Sarcosepta, 99 

 Snrsia siphonpphora, 110 



,, tubulosa, 68 

 Saturnidce, 44% 

 Satyridce, 44-? 

 Scalpellum, 292 

 Schistocephatus, 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, 4%8 

 Scolopophore, 471 



Scorpio, embryo, 538 ; nervous system, 

 519 ; digestive tract, 624 ; 

 heart, 527 



,, Africanus, 512 

 ,, occitanus, sexual organs, 533, 



534 



Scorpionidce, 509 

 Scuta, 304 



Scutigera coleoptera, trachse, 479 

 Scutigeridce, 438 



Sc-yllarus, 298 ; development, 395 



Scyphistoma, 72 



Scyphomedusce, 71 



Scyphopolyp or Scyphula, 70 ; develop- 

 ment, 130 



St'i/jiliozoa, 70 



Sedentaria, 182 



Segestria, 510 



Segmeutal 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 



Si-da, 290 



Silphidce, 442 



Siphonantha, 70, 108-114, 109 



Siphonaptera, 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 



Sol pu-g idee, 509 



Spadella, 185 



Sphwromidce, 295 



Sphcerozoum, 6 



SpJuerula bombi, 179 



Sphingina, 44% 



Spicules, 64 



Spiculispongice, 61 



Spionidce, 182 



Sp infer, 185 



Spirographis, 182 



Spirostomum, 9 



Spongelia, 62 



Spongilla, 61 



Spongiu, 63 



Spongioplasm, 26, 49 



Sporocysts, 169 



Spumellaria, 6 



Squame, 309 



Squilla, 295, 296 ; thoracic feet of larva, 

 320 ; circulatory system of 

 larva, 363 



,, mantis, genital organs, 375 

 Staphylinida', 44% 

 Statoblasts, 264 

 Stauridium cladonema, 68 



