560 



COMPARATIVE ANATOMY 



Rotalia Freycri^ 5 

 Rotatoria, ISo 

 liutij'cra, diagram, 185 

 Mugosa, 70 



Sabella, 183 

 SabeUaria, 183 



,, alveolata, nervous and nephri- 

 dial system, 221 

 Saccocirrus, 181 

 SaccvMna, 393 



,, carcini, 305 ; development, 386; 



section, 373 ; larval stages, 386 

 ,, externa, 387 



,, interna, 387 



Sagitta, 185 ; development, 281 ; section, 

 197 

 ,, bijiunctata, head of, 227 

 ,, liexaptera,, 227 ; eye, 231 

 Salpingoeca, 8 

 Sanatoria, 4^9 

 Salticus, 510 

 Saltigrada, 510 

 Sao, If-lS 

 Sapphirina, 391 



,, Edwardsii, nervous system, 



346 

 Sarcodictyum, 15 

 Sarcodina, 4 

 Sarcolemma, 4S 

 Sarcomatrix, 15 

 Sa,reoj>haga carnaria, nervous system, 



466 

 Sa/rcopsylla, J^Ifl 

 SarcopAidce, 510 

 Sarcosepta, 99 

 Sarsia siphonophora, 110 



,, tubulosa, 68 

 Saturn ida^, Ij.If-2 

 Satyridce, 44'^ 

 ScaJpellKin, 393 

 SchistocepJialus, 134 

 Schizonemertina, 178 

 Schizoneura, 440 

 Schizopoda, 397 ; thoracic feet, 321'; larva, 



392 

 SchuUzia, 156 

 Scolex, 138, 164 

 Scolopendrella, 4S8 ; heart, 476 



, , i^nviaculata, 444 ; poster- 



ior body, 453 

 Scolopendridce, 4^8 

 Scolopophore, 471 



Scorpio, embryo, 538 ; nervous system, 

 519 ; digestive tract, 524 : 

 heart, 527 

 ,, Africanus, 512 

 ,, occitanus, sexual organs, 533, 

 534 

 Scorpionidce, 509 

 Scuta, 304 



Scutigera coleoptera, trachse, 479 

 Scutigeridce, 438 



Soyllarus, 298 ; development, 395 



Scyphistoma, 73 



Scyphomedusce, 71 



Scyplwpolyp or Scyphula, 70 ; develop- 

 ment, 130 



Scypihozoa, 70 



Sedentaria, 183 



Segestria, 510 



Segmental organs, see Nephridia 



Segmentation, 120-129 ; nucleus, 33 



Seison, 185 



Semostomce, 73 



Sensory body of Ctenophora, 79, 96 



Sergestes, 398 



Serictery, 458 



Serpididm, 183 



Scrlularia, 68 



Sesiadce, 442 



Sialidce, 44^ 



Sida, 390 



Silphidce, 44^ 



Siphonantha, 70, 108-114, 109 



Siphonapitera, 441 



Siphonoplvora, 69 



Siphonostoma, 183 



Sipiunculacea, 183 



Sipunculidai, 183 



Si23unculus, 183 ; anatomy, 208 ; diagram 

 of muscles, 195 ; larva, 270 



Siriella, 397 



,, gracilis, pleopoda, 324 

 ,, Thompsonii, pleopoda, 324 



Sitaris, 492 



Sklerosepta, 99 



Sminthurus, 439 



Soleiwpharynx, 157 



Sohnaris, 69 



Soljyugidcc, 509 



Spadella, 185 

 Sphceromidce, 395 



SpluErozoum, 6 

 SpJicerula bombi, 179 

 Sphingina, 44^ 

 Spicules, 64 

 Spiculispongice, 61 

 Spionidm, 183 

 Spirifer, 185 

 Spirographis, 183 

 Spirostomum, 9 

 Spongelia, 62 

 Spongilla, 61 

 Spongin, 63 

 Spongioplasm, 26, 49 

 Sporocysts, 169 

 Spurnellaria, 6 

 Squame, 309 



Squilla, 395, 296 ; thoracic feet of larva, 

 320 ; circulatory system of 

 larva, 363 

 ,, mantis, genital organs, 375 

 Staphylinidm, 44^ 

 Statoblasts, 264 

 Stauridium cladonema, 68 



