INDEX 



811 



Rhabdites, 257* 



Rhabditis-form, 304 



Rhabdocoelida, 248*, 251, 252, 257, 260, 

 261, 202, 263, 264, 266, 267, 268, 271, 

 278, 279, 283 



Rhabdogaster, 313 



Rhabdome, 524* 



Rhabdomolgus, 414 



Rhabdonema nigrovenosum, 304, 305 



Rhagon-type of Sponge, 119* 



Rhinophore, 765* 



Rhipidodendron, 73, 76 



Rhipidoglossa, 714*, 736 



Rhizocephala, 552*, 565 



Rhizopoda, 45* : Example, 46 : Classi- 

 fication and general organisation, 47 



Rhizostomse, 176*. 181, 182, 224 



Rhizota, 321*. 327 



Rhombogene, 229* 



Rhopalura, 229, 230 



Rhijncheta, 102 



Rhynchobdellida, 504*, 505, 506,507,508 



Rhynchodemus, 251 



Rhynchonella, 359, 361 



Rhyncoccele, 285* 



Rhyncota, 618* 



Ring-vessel, 264* 



Rock-lobster, 555 



Rock systems, 7 



Rocks, igneous and aqueous, 6*, 7* 



Rods of retina, 750* 



Rosette, 398* 



Rosette (Earthworm), 451 



Rosette plate, 409 



Rostellum, 243* 



Rostrum, 529* 

 Rotalia, 53 



Rotation, sense of, 40 

 Rotifer, 320, 321 



Rotifera, 317* : Distinctive charac- 



ters and classification, 321 : Ex- 



ternal characters, 323, 324, 325 : 



Digestive organs, 326 : Excretory 



system, 327 : Nervous system and 



Sense organs, 327 : Reproduction 



and Development, 327 : Ethology, 



328 : Affinities, 328 



Rotulre, 389* 



Round-worms, 292 See Nemathel- 



minthes 

 Rugosa, 208* 



S 



&ABELLA, 466 

 Saccammina, 54 

 Saccocirrus, 454, 466 

 Saccosoma, 480, 482 

 Sacculi, 400* 



Sacculina, 552, 565, 583, 584 

 Sagartia, 188, 189 

 Sagitta, 310, 311, 312, 313 

 Sagittal plane, 210* 



Sail, of Siphonophora, 164, 165 



Salinella, 231 



Saliva, 34* 



Salivary glands, 34* 



Salivary receptacle, 608 



Salmacina, 475 



Salpingceca, 79 



Saltatoria, 616, 621 



Sand-hopper See Orchestia, 554 



Saprophytic nutrition, 71*, 74 



Sarcocystidea, 84, 90 



iSarcocystis, 90 



Sarcolemma, 29* 



Sarcophaga, 629 



Sarcoptes scab ice i, 649 



Sarsia, 145 



Scale -insects, 619, 632 



Scallop, 678 



Scaphopoda, 663, 736*, 737, 738 



Schistosomum hcvmatobium, 280 



Schistosomum japotdcum, 280 



Schizogony, 86*. 87. 88 



Schizopathes, 199 



Schizopod-stage, 584, 585 



Schizopoia, 586 



Scirtopoda 322*, 323 



Sclerite, 548* 



Scleroblast, 111*, 120, 121, 124 



Sclerotic, 750 



Scolex, 243*, 275 



Scolopendra, 599 



Scolopendrella, 598, 600 



SCORPION See BUTHUS 



Scorpionida, 644*, 656, 659, 660 



Scorpion -flies, 621 



Scorpion-spiders, 645 



Scorpions, 514, 637, 650, 659, 660 



Scrobicularia piperata, 681 



Scuta, 563, 564 



Scutariella, 253 



Scntigera, 600, 601 



Scutigerdla, 599 



Scyllarus, 573, 574 



Scyllis ratnosa, 476 



Scyphistoma See Scyphula 



Scyphozoa, 129 : Example, 167 : Struc- 

 ture and classification, 175 : Syste- 

 matic position of example, 176 : 

 Additional remarks on. 183 



Scyphula, 174*, 175, 227 



Sea-anemones, 129, 183, 192, 194, 197, 

 198 See Tealia 



Sea-blubbers, 181 



SEA-CUCUMBER, External features, 393 : 

 Structure of body-wall, 394 : Am- 

 bulacral system, 394 : Nervous- 

 vascular systems, 394 : Ccelome, 394, 

 395 : Enteric canal, 395, 396 : Re- 

 productive organs, 396 : Develop- 

 ment, 396 : Systematic position, 406 



Sea-cucumbers, 404 Seo Holothu- 

 roidea 



Sea-fans, 193, 201 



