798 



INDEX 



Flagellate canals, of Sponges, 108. 109*, 

 110, 119 



Flagellate cells, 110*, 1 10 



Flagellulfe, 51*, 56, 60, 61, 63, 67, 69, 

 71, 80, 81, 82 



Flagellum, 25*, 69, 70, 71 : of Astacus, 

 531 



Flame-cells, 235, 263, 264 



Flat -worms See Plat vhelmint lies 



Fleas, 620, 625, 636 



Flies, 514, 602 



Float, 160, 161* 



Floscularia, 321, 323, 324, 325 



Flustra, 340 



Folliculina, 96 



Food vacuole, of Actinophrys, 59 : 

 Paramvcium, 92* 



Food-yolk, 31 



Foot, of Anodonta, 664 : Pelecypoda, 

 683 : Amphineura, 695 : Triton, 705, 

 706 : Gastropods, 719 : Sepia, 739, 

 740 : Nautilus, 756 : Cephalopoda. 

 768 



Foot-gland, 348 



Foramio.iJera, 48* : General structure, 

 51. 52, 53, 54 : Skeleton. 53, 54, 55, 

 56 : Protoplasm, 55, 50 : Dimor- 

 phism, 56*, 57, : Reproduction, 56 : 

 Distribution, 58 



Forcipulata, 402* 



Forcipulate pedicellaria?, 37U* 



Formica rufa, 636 



Fossettes, 577* 



Fossils, 7* 



Fossula, 208 



Fredericella, 341 



Fresh-water Crayfish, 527 



Fresh-water Mussel See Anodonta 



Fresh-water Sponges, 126, 127 



Fresh-water Worms, 429 



Fritillaria, 231 



Frondiculuria, 54 



Frontal suture, 590* 



Fulcrum (of Rotifera), 319 



Fnnyia, 203 



Funiculus, 336*, 344 



Funnel, 770 



Funnel folds, 770 



G 



G 



' ALATHKA, 555 

 Galea, 605 

 Galeodes, 645, 647 

 Galeolaria ccespitosa, 457 

 flail-flies, 621, 632 

 Gall -insects, 632 

 Galls, 632* 

 Gametes, 50*, 78 : of Flagellata. 76. 



79* : Sporozoa, 82, 83 

 Gametocytes, 82. 85*, 88. 89 

 Gammarns, 554, 569 



< '-,\ niobium, 141*, 175 



( ;,unogenesis, 22* 



Ganglia, 38, 2::s 



Gastral cortex, 109. HI*. 120 



Gastric filaments, of Aurelia, 171* 



Gastric mill, 578 : of Astacns, 535 



Gastric ostium, 111* 



Gastric ridges, of Aurelia, 172*: 

 pouches, 169* 



Gastrodes, 221, 223 



Gastrolith, 536* 



Gastrophilus equi, 619. 620 



Gastropoda, 663, 702* : Example, 702 : 

 Distinctive characters and classifica- 

 tion, 713 : Systematic position of ex- 

 ample, 715: General organisation, 

 715 : External features, symmetry, 

 &c., 715: Shell, 717: Foot, 719: 

 Head, 720 : Mantle, 722 : Respira- 

 tory organs, 722 : Osphraclium, 724 : 

 Digestive organs, 724 : Heart, 725 : 

 Nervous system, 725 : Organs of 

 special sense, 726 : Excretory organs, 

 728 : Reproduction, 728 : Develop- 

 ment, 729, 730, 731. 732, 733, 734, 

 735 : Ethology and distribution, 735 : 

 Relationships', 736 : Appendix, 736 



Gastropores, of Milleporn. 157* 



Gastrotricha, 3 1 1 /. 328*. 329 



Gastrozooids, 164. 199 



Gastrula, 24* 



Gastrulation. 24* 



Gelasimus, 576. 586 



Gemmules, 112, 122* 



Gense, 604* 



Generic, 1* 



Genital cloaca. 245* : rachis, 378, 421 : 

 stolon, 378, 421 : plates, 389 : bursae, 

 420 : operculum, 64U* 



Genital system See Reproductive sys- 

 tem 



Genus, 1* 



Geological distribution See Distribu- 

 tion, geological 



Geoplanidcr, 249 



Gephyrcei, 490 



Germarium, 236*, 265, 267 



Germinal bands, of Cleps-ine, 509 : of 

 Peripatus, 597 



Germinal disc, 775 



Germinal lay !;, 24* 



(terminal spot. 20*. 21. 31 



Germinal vesicl--, 2n*. 21 



Germ-vitellarium, 2ii."> 



Giant Clam, O'VJ 



Giant fibres, 466 



Giant nerve -cells. 466 



Gigantorhynchus, 307, 308. 309. 310 



Gill-cover, ni . l.v/i/iv/.s-, ;">L'S 

 Gills, 36* S . ! IN-spiration 

 Gizzar.-i. :::; 

 Glabella, . r >'Mi^ 

 Gl mds, 26* 



