7i8 



INDEX 



Regular sea urchins, see Endocyclica 



Relation of Protozoa to their En- 

 vironment, 40 



Relicts, 393 



Renal openings (apertures, papillae) 

 of Mollusca, 544, 549, 556, 565, 



591 

 Renopericardial openings (apertures, 



canals), 556; 572, 593 

 Repeated fission of Protozoa*, 28 ; 



29, 45, 54, 57 



Reproduction, 5. See also Asexual 

 reproduction. Sexual reproduc- 

 tion ; of Protozoa, see Fission 



Reproductive aperture, organs, see 

 Generative organs 



Reserve materials, 5, 20 



Respiration, 4, 139; of Arthropoda, 

 314; of Crustacea, 348 ; of Cyclops, 

 373 ; of Lamellibranchiata, 576 ; of 

 Protozoa, 22 ; of Tubiculous Poly- 

 chaeta, 270. See also Respiratory 

 movements. Respiratory organs 



Respiratory movements, of Aphro- 

 dite, 268; of Arachnida, 517; of 

 Branchiopoda, 355 ; of Carcinus, 

 409 ; of Crustacea, 348 ; of Cyclops, 

 373; of Gasteropoda, 556; of In- 

 secta, 441 ; of Mysis, 393 ; of 

 Pulmonata, 556, 572; of Tubicu- 

 lous Polychaeta, 270; of Tubifex, 



293 



Respiratory organs, 139; of Arach- 

 nida, 517; of Arthropoda, 314; of 

 Branchiopoda, 354; of Chaeto- 

 poda, 263 ; of Crustacea, 348 ; of 

 Echinodermata, 628 ; of Holo- 

 thuroidea, 650; of Lamellibran- 

 chiata, 576 ; of Ligia, 397. See also 

 Gills, Lung, Tracheae 



Respiratory pigments, see Pigments, 

 Blood 



Respiratory trees, 629, 650 



Resting cysts, 22; eggs, 241, see also 

 Winter eggs; phase of Phyto- 

 mastigina, 47 



Rete mirabile, 650 



Retinaculum, 429, 489 



Retinulae, 310 



Retractor muscle(s), of penis, 561 ; of 

 proboscis, 233; of stomach, 636; 

 of tentacles, 649 



Retral processes, 76 



Retropharyngeal band, 672 



Rhahdammina, 76; 12; ahyssorwn, 



Rhabdites, 204 



Rhabditis, 245 ; 247 



Rhabditoid larva, 251 



Rhabdocoelida, 214; 201 



Rhabdoliths, 50 



Rhabdom, 310 



Rhabdomeres, 310 



Rhabdopleura, 668 ; 660, 662 ; nor- 

 mani, 667 



Rhipicephalus , 537 



Rhipidoglossa, 563 



Rhizocephala, 382; 330, 377 



Rhizochrysis, 50 



Rhizocrinus, 658; 657 



Rhizomastigina, 60; 69 



Rhizoplasts, 17 



Rhizopoda, see Sarcodina 



Rhizopodia, 14, 15 



Rhizostoma, 179 



Rhizostomeae, 179 



Rhodites, 500 



Rhodnius, 437, 440 n. ; prolixus, 476, 

 438 



Rhombifera, 659 



Rhyacophila, 487 



Rhynchobdellidae, 300; 297, 298 



Rhynchoccel, 233 



Rhynchodaeum, 235 



Rhynchodemus terrestris, 215 



Rhynchota, see Hemiptera 



Rhyssa, 500 



Ring canal of Polyzoa, 606 



Rings (Nervous, Water vascular, 

 etc.) of Echinodermata, 623 ; 626, 

 630. See also Nervous system, 

 W^ater vascular system, etc. 



Ripe proglottis, 225 ; 227 



Ripple-marking, 604 



Rods of eyes of Arthropoda, 310 



Rosette ossicle, 656 



Rostellum, 227 



Rostrum, of Cephalopoda, 600; of 

 Crustacea*, 334; 370, 390, 407, 

 415 ; of Hemiptera, 474, 476 



Rotifer f 241 



Rotifera, 237; 2, 197, 244 



Rotulae, 645 



Royal pair, 469;. 471 



Sabella, 264 

 Saccharicida, 476 

 Saccocirrus, 295 ; 260, 295 



