602 



INDEX. 



Filibranchiata, 345. 

 Filigrana, 468. 

 Filograna, 491. 

 Fiona, 410, 413. 

 Firoloida, 402 

 Fission of embryonic 



polyzoa, 563 ; zone of 



507. 

 Fissurella, 360, 361, 367, 



376, 380, 385, 394. 

 Flabelligera, 489. 

 Flabellina, 14. 

 Flabelluin, 194. 

 Flagellata, 27. 

 Flame-cell, 209. 

 Fletcherodrilus, 510. 

 Floresca, 167. 

 Floscula, 167. 

 Floscularia, 301, 307. 

 Floscnlaridae, 300. 

 Fluke, 238. 

 Flustra, 554, 565. 

 Flustramorpha, 566. 

 Flustrella, 559, 567. 

 Flustrina, 565. 

 Folliculina, 48. 

 Foot of Lamellibranch, 



330; ofMolhisca, 318;. 



of Nautilus, 42-2. 

 Foraminifera, 11. 

 Forcepia, 96. 

 Forcipate, 307. 

 Forskalia, 153. 

 Forskalioj)sis, 153. 

 Fossarus, 398. 

 Foveolaria, 565. 

 Frcdericella, 568. 

 Freshwater Gastropoda,. 



386 ; Medusa, 134 ; 



Streptoneura, 385. 

 Fridericia, 509 

 Fringing reef, 171. 

 Frondicularia, 14. 

 Frondipora, 566. 

 Frontal area, 40 ; cirri,. 



49 ; organ, 218. 

 Frontonia, 47. 

 Fulcrum, 307. 

 Fulgur, 397. 

 Fuligo, 17. 

 Fulla, 179. 

 Fungia, 196. 

 Fungiacyathus, 194. 

 Fimiculina, 181. 

 Funiculus, 551. 

 Funnel of Cephalopoda, 



422 ; of Ctenophore, 197. 

 Furcularia, 309. 

 Fusulina, 15. 

 Fusus, 397. 

 f.w.= fresh-water. 



