446 



INDEX GLOSSARY. 



Excretory organs of Nereis, 119, 120 

 Exoasci, 26 1 'I 



Exogen, a plant whose stem increases 

 in thickness by growth in the 

 region between the bark and 

 the wood. 

 Exoskeleton, an external skeleton. 



of arthropods, 417 



of molluscs, 418 



of vertebrates, 419 

 Eye, control of light intensity in, 386 



focusing of, 385 

 Eyes, 77, 79, 80 



of arthropods, 378 



of cave fishes, 796 



of insects, 384 



of vertebrates, 379 



of worm, 376, 377 

 Eyespot, in protozoa, 374 

 Eyespots, 526, 528 



F, FI, 2 first filial, second filial 



and third filial generations. 

 Falcon, 650 



Fascia, sheets or layers of connective 

 tissue covering organs or 

 forming attachment for mus- 

 cles, 721 



Fasciola a liver fluke. 

 Fats, 473 

 Fauna of Africa, 826 



of Australia, 825 



of caves, 838 



of fresh waters, 831-835 



of oceanic islands, 827 



of South America, 826 

 Feathers, 347, 646 

 Feigning, 864 

 Felidae, 663 

 Female, 694 



Ferment, a substance which causes a 

 chemical change in other sub- 

 stances without undergoing a 

 permanent change itself. 

 Fermentation, 230, 453, 670 

 Fern, development of, 708 



sperms of, 700 

 Ferns, 281 

 Ferret, 663 

 Fertilization, 135, 187, 694, 698 



in hydra, 500 



stimulus, 700 

 Filament, 123 

 Filices, 285 

 Filicinae, 281 

 Finches, 650 



Fire-fly, 220, 872 



Fire-flies, rudimentary wings of, 797 



Fishes, glands of, 350 



respiration in, 479 



skeleton of, 424 



sense of taste of, 370 

 Fission reproduction by division, 671 

 Fissipedia, 663 



Flagellata Flagellates, 512, 766 

 Flagellum a whip-like protoplasmic 



appendage. 

 Flame cell, 534 

 Flamingo, 650 

 Flat fishes, 322, 636 



worms, digestion in, 454 

 Flea, 237, 762 

 Flies, 587 



Flight, adaptation for, 646 

 Floral structures, 27 

 Floridese, 248 

 Flounder, 66 



symmetry of, 322 ' 

 Flower, function of, 135 



homology of, 115-120 

 Fly catcher, 650 

 Fcetal membranes, 173, 174, 641 



of mammals, 651 

 Foliate papillae, 371 

 Follicle, a minute cavity, sac, or tube, 



161 



Food of animals, 447-451 

 Foot, of fern, 282, 708 



of gastropods, 595 



of molluscs, 592 



of mosses, 274 



of rotifers, 539 

 Form of animals, 308 



of organisms, 7 

 Four-o'clock, 242, 782 

 Fowl, 650 



Free nerve terminations, 362 

 Fresh water fauna, 831-835 

 Frigate bird, 650 

 Frog, metamorphosis of, 211 



respiration in, 476 

 Frogs, 637, 640 

 Fruit, 149, 151 

 Fruits, aggregate, 164 



kinds of, 152-165 



function of, 168 . 



multiple, 165 



simple, 152-163 

 Fucus, fertilization of, 693 

 Fulgur, shell of, 213 

 Function of the senses, 405 

 Fungi, 177, 179-180 



Numbers refer to paragraphs ; Black Face numbers refer to figures. 



