^4 



INDEX 



Food, 275, 297 



of fishes, 577 

 I'\)od chains, 51 

 Food gettiiiK in plants, 53-54 

 Food making in green plants 



factors in, 253-254 



summary of, 270 

 Food tube, worker bee, 209 

 Foot, evolution of, 5^3 

 Forage plants, 515 

 Foramen magnum, 352 

 Foraminifera, 328, 478 

 Forbes, Prof., 577 

 Fore-brain, 346 

 Forest fires, 592 



relation to floods, 590 

 Forest products, 574, 593-594 

 Forest service, work of, 593-595 

 Forest waste, 592-593 

 Forests 



enemies o*", 593 



usefulness of, 589-590 

 Fossils, 477-480, 510, 533, 554 

 Four-o'-clock, 446 

 Fovea centralis, 360 

 Fowl, 514 

 Fragillaria, 71 

 Fragmentation, 411 

 Fraunhofer's lines, 256, 257 

 Free-martin, 398, 471 

 French, 561 

 Fresh-water mussel, life history of, 



598 

 Frogs, 103, 109, 336, 491, 540, 545 

 Fruit fly, 525 

 Fucus, 71 

 Ftnmria 



gametophyte of, 175 



life cycle of, 175 



sporophyte of. 174 

 Fundus, 288 

 Fungi, 71, 228 



harm done by, 579-580 



method of nutrition in, 174 

 Funiculus, ventral, lateral, and dorsal, 

 353 



Gaertner, 442 

 Galapagos Islands, 508 

 Galen, 305 

 Galileo, 495 

 Gall, 218 

 Galliformes, 114 

 Gall insects, 218 

 Galtsoff, 35 

 Gametes, 411, 446, 460 



Ulothrix, 171 

 Gametocytes, 228 

 Gametogenesis, 428 



Gametophytes, 498 



development of in flowering plants, 

 / / 

 Gametophyte generation, evolution of, 



178 

 Ganoidei, 107 



Garden of Eden, biological, 564-565 

 Garpike, teeth of, 285 

 Gastric gland, 293, 294 

 Gastric Hpase, 294 

 Gastric mill, 282 

 Gastropoda, 97 

 Gastrotricha, 89 

 Gastrovascular cavity, 281 



Hydra, 181-182 

 Gastrovascular system, 301 

 Gastrula, 418 

 Gastrulation, 418 



earthworm, 197 

 Geese, 114 

 Gemmule, 410, 491 

 Genes, 430, 431, 435, 456, 457, 461, 640 



subtraction of, 414 

 Genetics, 434, 435, 516 

 Genial tubercles, 552 

 Genotype, 446, 449 

 Genus, concept of, 64-68 

 Gephyrea, 93 

 Germans, 561, 562 

 Germ cells, 412 



addition of, 414 

 Germinal selection, 527 

 Germ plasm, 438-439, 466, 526, 640 

 Gestalt psychology, 385 

 Gibbons, 537, 538 

 Gill arches, 329 

 Gill books, 314 

 Gills, 315 



Giraffe, 117, 495, 508, 517, 519 

 Girdle 



hip, 332 



pectoral, 332 



pelvic, 332 



shoulder, 332 

 Gizzard, 288 

 Glabella, 563 

 Glacial period, 513, 560 

 Gland cell, 341 

 Glands 



duodenal, 292 



gastric, 290 



lymph, 304 



intestinal, 292 

 Gloecapsa, 69 

 Glomerulus, 323, 324 

 Glottis, 287, 317 

 Glucose, 279, 280, 295, 298 

 Glycerin (glycerol), 295, 298 

 Glycogen, 296, 298 



