Ganglion {cont ) 



522 ; Inferior buccal, 522 ; Infundi- 

 bular, 520, 522 ; of Ciona, 596, 599 ; 

 of Rhizocephala, 303, 344; Pedal, 

 477, 520; Pleural, 477, 499, 507; 

 Prostomial, see Cerebral; Suboe- 

 sophageal, 263, 303, 340, 379, 390, 

 452, 457, 459, 467, 468; Superior 

 buccal, 522 ; Supraoesophageal, see 

 Cerebral; Trunk, of Appendicu- 

 laria larva, 597; Visceral, 521 



Gasteropoda, 476 



Gasterostomimi, 197 



G. fimbriatum, 194, 197 



Gasterozooids, of Doliolida, 608 ; 

 606; of Siphonophora, 145, 147 



Gastral layer, no 



Gastric cavity, 130 



Gastric filaments, 152 



Gastric glands, 212 



Gastric mill, 307 



Gastric shield, 503 



Gas trades, 173 



Gastrula, 120; of Echinodermata, 

 555 ; of Polychaeta, 248 



Gastrulation, of Echinodermata, 555 ; 

 of Polychaeta, 248 ; 249 



Gecarcinus, 374; 372 



Gemmules, 116 



Generative organs, of Amphineura, 

 475; of Arachnida*, 452, 457, 

 461, 465; of Archiannelida*, 261, 

 262; of Arthropoda, 280; of 

 Balanoglossus, 586, 589; of Bra- 

 chiopoda, 540; of Chaetognatha, 

 544 ; of Chaetopoda, 229 ; of Chilo- 

 poda, 378; of Cnidaria*, 135, 152, 

 155, 160; of Crustacea*, 314, 315, 

 321, 324, 329, 334, 337, 340, 346, 

 356, 370, 373 ; of Ctenophora, 172 ; 

 of Diplopoda, 381 ; of Echinoder- 

 mata, 553, 561, 564, 570, 580; of 

 Hirudinea, 265, 267 ; of Insecta, 

 396, 396, 397; of Lamellibran- 

 chiata*, 507, 509, 510; of Mol- 

 lusca, 271 ; of Nematoda, 218; of 

 Nemertea, 207 ; of Oligochaeta*, 

 253, 254, 259; of Onychophora, 

 285 ; of Opisthobranchiata, 494, 

 495; of Platyhelminthes*, 183, 

 190, 192,199,201,203; ofPoly- 

 chaeta,229, 242, 244 ; of Pulmonata, 

 486,487, 496 ; oiiUiahditis, 216 ; of 

 Rotifera,2i2; of Scaphopoda,499; 



INDEX 623 



of Sepia, 522; of Streptoneura*, 



478, 490, 493 ; of Tunicata, 596, 



600 

 Generative pore, see Generative 



organs 

 Genital aperture, see Generative 



organs 

 Genital atrium, of Helix, 486; of 



Platyhelminthes, 185; oi Stylaria, 



259 

 Genital bursae, 553, 564 

 Genital canal, 580 

 Genital coelom, 518 

 Genital cords, 580 

 Genital ducts, see Generative organs 

 Genital opening, see Generative 



organs 

 Genital operculum, 450 

 Genital organs, see Generative organs 

 Genital plate, 564 

 Genital pleurae, 586 

 Genital rachis, 553; of Crinoidea, 



553, 580; of Echinoidea, 533, 



570 

 Genital stolon, see Axial organ 

 Genital system, see Generative 



organs 

 Geonemertes, 208 

 Gephyrea, 268; 229 

 Gerardia, 347 

 Germarium, 397; 212 

 Germs (gametes), see Gametes; of 



Cnidosporidia, 93 

 Geryonia, 143 

 Giardia, 62 

 G. intestinalis, 61 

 Gid, 202 



' ' GiW oi Salpa, 607 

 Gill books, 445 ; 278, 454, 455, 457 

 Gill chamber of Decapoda, 366 

 Gill clefts, of ascidian tadpole, 597; 



of Balanoglossus, 581, 585, 587 ; of 



Cephalodiscus, 581, 590; of Chor- 



data, 583 ; of Thaliacea, 602 ; of 



Tunicata, 581 

 Gill filaments, 499 

 Gill lamellae, 499 



Gill plates of Lamellibranchiata, 499 

 Gill pouch, see Gill clefts 

 Gill slits, see Gill clefts 

 Gills, of Arthropoda, 278; of As- 



teroidea, 553, 558; of Crustacea*, 



311, 340, 350, 351, 353, 354, 359, 

 361, 366, see also Epipodites; of 



