INDEX 



719 



Sacculina, 382; 383, 384, 385 



Sagitta, 622 ; 129, 620, see also Chae- 

 tognatha ; bipunctata, 620, 62 1 ; 

 hexaptera, 619 



Salivary glands, of Arachnida*, 522, 

 530, 534, 540; of Helixy 558; of 

 Hirudinea, 297 ; of Insecta, 432 ; of 

 Lithobius, 421 ; of Onychophora, 

 320; of Sepia, 595 



Salpa, 686; 196, 677, 678, 684; 

 deniocratica-mucronata, 682, 683 



Salpida, 685 ; 679, 682 



Saltatoria, 466 



Sao hirsuta, 325 



Saprophytic nutrition, 19 n.; of 

 Phytomastigina*, 46, 47, 49, 52, 

 54> 57 > of Protozoa, 20, 42 



Saprophytic Protozoa, see Sapro- 

 phytic nutrition 



Saprozoic, see Saprophytic 



Sarcocystis, 102; li?idemanm, 103 



Sarcodina, 68 ; 44, 49 



Sarcophaga, 436 



Sarcosporidia, 102 



Sarsia, 169; 167 



Saxicava, 586 



Scallops, see Pec ten 



Scalpellum, 380; vulgare, 381 



Scaphites, 605 



Scaphopoda, 572 



Scarabaeus Thonisoni, 494 



Scarabeidae, 494, 495 



Scent scales, 488 



Schellackia, 91 ; 90 



Schistocephalus gasterostei, 228 



Schistosoma, 222 ; 222 



Schizocystis, 93 ; 94 



Schizogony*, 88; 37, 89, 91, 93, 94 



Schizogregarinaria, 93 



Schizopod larva, 389 



Schizopoda, 388 



Schizozoites*, 88 ; 37, 89, 93 



Sclerotium, 86 



Scolex, 225 ; 227 



Scolopendra, 306 n., 307, 421 



Scorpio, 524; swammerdanii, 521 



Scorpionidea, 520 



Scutigera, 421 



Scutum, 378 



Scyphistoma, 179 



Scyphomedusae, 172; 152 



Scyphozoa, see Scyphomedusae 



Scytomonas, see Copromonas 



Secondary body cavity, see Coelom 



Secondary embr>'os, 612 



Segmental organs, 275. See also 

 Coelomoducts, Nephridia 



Segmentation, 143 ; of Annelida, 260, 

 261; of Arthropoda, 308, 309; of 

 Cestoda, 225; 143; of Chordata, 

 660; of Vertebrata, 143 ; 661 ; sug- 

 gested by certain organs in Mol- 

 lusca, 549, 603 



Segmentation of the ovum, see 

 Cleavage 



Segments of the body, see Somites 



Self-fertilization, 250, 561 



Seminal groove, of Oligochaeta, 289 ; 

 of Opisthobranchiata, 567 



Seminal receptacle of Sagitta, 619 



Seminal vesicles (Vesiculae semi- 

 nales), of Chaetognatha, 619; of 

 Insecta, 447 ; of Oligochaeta, 286, 

 291 ; of Platyhelminthes, 21.0 



Sense organs, of Araneida, 533 ; of 

 ascidian tadpole, 676 ; of Chaeto- 

 poda, 263, 265 ; of Coelenterata*. 

 147, 149, 156, 160, 161, 164, 177; 

 of Crustacea, 340; cf Echino- 

 dermata, 630; of Hirudinea, 300; 

 of Insecta, 449 ; 426 ; of Mollusca*, 

 549, 555 ; of Onychophora, 31? ; of 

 Platyhelminthes, 200 ; of Protozoa, 

 17 ; of Rotifera, 240. See also Eyes 



Sensillae, 450, 451 



Sepia, 589; 588, 590, 597, 599, 600, 

 601, 602; officinalis, 589; 592, 593, 



594, 595 



Sepioidea, 588 



Sepiola, 588, 602 



Septa, of Chaetopoda*, 261, 272, 285, 

 291, 294; of shell of Tetrabranchi- 

 ata, 602, 604; of Zoantharia, 190 



Septibranchiata, 579 



Sergestes, 353; arcticus, 335 



Serpula intestinalis , 288 



Sertularia, 164; 163 



Sexual congress, see Sexual differ- 

 ences and sexual behaviour, Mutual 

 fertilization 



Sexual differences and sexual be- 

 haviour, of Arachnida, 524, 529, 

 " 533, 537 1 of Archiannelida, 296 ; of 

 Balanoglossus, 668 ; of Bonellia, 

 302 ; of Cephalopoda, 598 ; of Coe- 

 lenterata, 152; of Crustacea*, 351, 

 356, 358, 362, 372, 373, 374, 375, 

 376, 381, 382, 383, 397, 402, 410; 



