INDEX 



949 



Feathers, development of, 734. 



— of pigeon, 734. 



— parts of, 733, 734, 736. 



— types of, 735. 



Feeding in plants and animals, 24. 



Felidae, 871. 



Felis, 871. 



Femoral glands, 694. 



Femur, 538. 



Ferments, 26. 



— digestive, 30. 



in bee, 382. 



in sponges, 159. 



in starfish, 295. 



Fertilisation, 53, 72. 



— of egg-cell, 73. 



— stages in the evolution of, 63. 

 Fibula, 538. 



Fierasfer, 209, 308, 565, 630. 

 Filaria, 242, 409. 

 Filibranchia, 480. 

 Filoplume, 734. 

 Fins, 631. 

 Firmistemal, 657. 

 Firmistemia, 677. 

 Fishes, 5, 587. 



— abyssal, 630. 



— and Amphibians compared, 6, 650. 



— colour of, 627. 



— commensalism in, 630. 



— fins of, 5, 631. 

 ■ — • food of, 627. 



— general characters of, 588. 



— hermaphrodite, 628. 



— movement in, 626. 



— parental care among, 628. 



— reproduction of, 628. 



— senses of, 627. 



— viviparous, 628. 

 Fish-lice, 342, 630. 

 Fission, 62. 

 Fissipedia, 873. 

 Fissurella, 473. 

 Flagella, 13, 136. 

 Flagellata, 133. 

 Flagellum of snail, 444. 

 Flame cells, 212. 



— of a platyhelminth, 211. 

 Flat-fishes, 641. 



Fleas, 406. 

 Flies, 384, 406. 

 FUght of Birds, 756. 



— rapidity of, in insects, 388. 

 Flippers, 865. 



Flocculus, 746, 799. 



Floridine in Sponges, 159. 



Floscularia, 281, 282. 



Flukes, 211. 



Flustra, 287. 



Fly emerging from pupa-case, 402. 



Flying fish, 627. 



— Mammals, 828. 



Foetal membranes, 822, 823, 826, 828. 



of Birds, 767. 



of Mammals, S23. 



of Reptiles, 4, 717. 



Follicle cells, 817. 



mite, 423, 423. 



Follicular envelope of ovum ,67. 

 Food of fishes, 627. 



— vacuoles, 113. 



Foot of Molluscs, 8, 433, 466. 

 Foramen magnum, 790. 



— of Monro, 797. 



— Panizzce, 714. 



— triosseum, 737, 741. 



Foraminifer, formation of shell in a, 132. 



— pelagic, 133. 

 Foraminifera, 51, 131. 

 Fore-brain = Prosencephalon, 539. 

 Fore-gut =Stomodaeum, 553. 

 Form and symmetry, 41. 

 Fornix, 797. 



Fossils, 99. 



Fowl, pelvic girdle and hind-limb of. 



745. 

 Fox, 872. 

 Fresh-water fauna, 898. 



— mussel, 446. 

 Fritillaria, 313. 

 Frog, 651, 651. 



— arterial system of, 663. 



— brain of, 658. 



— division of ovum in, 671, 



— embryo of, 672. 



— life-history- of, 676. 



— nervous system of, 659. 



— pectoral girdle of, 655. 



— pelvis of, 657. 



— skeleton of, 656. 



— skull of, 654. 



— urinogenital system of, 668. 



— venous system of, 664. 



— vertebral column and pelvic girdle of, 



653. 



Fuligo, 131. 



Function in plants and animals resem- 

 blances in, 22. 



Functional modifications, 911 



Functions, change of, 44. 



— of Animals, 26. 



— secondary, of organs, 44. 

 Fundulus, 80. 



Fungia, 197, 205. 



Gad-fly, 406. 

 Gadus, 616. 

 Galago, 88 T. 

 GalatRea, 235, 353. 

 Galea, 372. 

 Galeodes, 417. 

 Galeopithecidae, 876. 

 Galeopithecus, 829, 876. 

 Gall-bladder, 803. 



flies, 406. 



mite, 423. 



Galton's law, 90. 

 Gamasus, 422, 423. 

 Gametocytes, 123, 126 

 Gammarus, 243, 351. 

 Ganglion, 50. 

 Ganoid scales, 632. 



