INDEX 



639 



Ripple-marking, 528 

 Rods of eyes of Arthropoda, 274 

 Rosette ossicle, 579 

 Rostellum, 199 



Rostrum, of Cephalopoda, 524; of 

 Crustacea*, 297, 331, 349, 365, 372 

 Rotifer, 212 

 Rotifera, 209; 2 

 Rotulae, 567 

 Royal pair, 412; 414 



Sahella, 231 



Saccocirrus, 261 ; 228, 262 



Saccidina, 343 ; 344, 345, 346 



Sagitta, 545; 121, 545. See also 

 Chaetognatha 



S. hipiinctata, 544, 544 



5. hexaptera, 543 



Salivary glands, of Arachnida*, 450, 

 458, 462, 467; of Helix, 485; of 

 Hirudinea, 263 ; of Insecta, 388 ; 

 of Lithobius, 378 ; of Onychophora, 

 284; of Sepia, 519 



Salpa, 607; 173, 599, 603 



aS. democratica-miicronata, 604, 605 



Salpida, 607; 600, 603, 604 



Saltatoria, 409; 410 



Sao hirsuta, 289 



Saprophytic nutrition, 14 n.; of 

 Phytomastigina*, 40, 41, 44, 46, 

 48, 49, 50; of Protozoa, 15, 37 



Saprophytic Protozoa, see Sapro- 

 phytic nutrition 



Saprozoic, see Saprophytic 



Sarcocystis, 95 



S. lindemanni, 96 



Sarcodina, 63 ; 38, 39, 43 



Sarcophaga, 390 



Sarcosporidia, 95 



Sarsia, 145 ; 146 



Saxicava, 511 



Scallops, 509 



Scalpellum, 341 ; 343 



S. vulgare, 342 



Scaphites, 529 



Scaphopoda, 495 



Scent scales, 429 



Schellackia, 86; 85 



Schistocephalus gasterostei, 202 



Schistosoma, 196 



Schizocystis, 88 ; 89 



Schizogony, 83 ; 32, 86, 88, 89 



Schizogregarinaria, 88 



Schizopoda, 348 



Schizozoites, 83; 32, 86, 88 



Sclerotium, 81 



Scolex, 199 



Scolopendra, 272 n., 378 



Scorpio, 452 



S. swammerdami, 449 



Scorpionidea, 448 



Scutigera, 378 



Scutum, 338 



Scyphistoma, 155 



Scyphomedusae, 150; 132 



Scyphozoa, see Scyphomedusae 



ScytomonaSy see Copromonas 



Secondary body cavity, see Coelom 



Secondary embryos, 536 



Segmental organs, 242 ; 240. See also 

 Coelomoducts, Nephridia 



Segmentation, 124; of Annelida, 

 228, 229; of Arthropoda, 271; of 

 Cestoda, 199; 124; of Chordata, 

 583 ; of Vertebrata, 124, 584; sug- 

 gested by certain organs in Mol- 

 lusca, 476, 527 



Segmentation of the ovum, see 

 Cleavage 



Segments of the body, see Somites 



Seminal groove, of Oligochaeta, 256 ; 

 of Opisthobranchiata, 494 



Seminal vesicles (Vesiculae semi- 

 nales), of Insecta, 397; of Oligo- 

 chaeta, 253, 259 



Sense organs, of Araneida, 461 ; of 

 ascidian tadpole, 598; of Chae- 

 topoda, 230, 231, 235, 258; of 

 Coelenterata, 128, 13.6, 139, 139, 

 143, 150; of Crustacea, 305; of 

 Echinodermata, 554 ; of Hirudinea, 

 265 ; of Insecta, 383 ; of Mollusca, 

 475, 482, 509, 522, 523 ; of Myria- 

 poda, 375 ; of Nemertea, 207 ; of 

 Onychophora, 280; of Platyhel- 

 minthes, 174; of Protozoa, 14; of 

 Rotifera, 212. See also Eyes 



Sepia, 522; 513, 514, 515, 519, 520, 

 521, 523, 523, 524, 524, 525, 527 



S. officinalis, 513 ; 516, 517, 518, 519 



Sepiola, 513, 525 



Septa, of Polychaeta, 251 ; of shell of 

 Tetrabranchiata, 526, 527, 528 ; of 

 Zoantharia, 167 



Septibranchiata, 504 



Sergestes, 316 



S. arcticus, 299 



Serpula intestinalis , 255 



