598 



INDEX 



Fruit fly (see Drosophila) 

 Fry, 356 

 Fungia, 152 

 Funiculus, 188 



o 



Galen. 550-552 



Galileo, 552 



Gall bladder, 322, 323 



Gall flies, 287 



Gall gnats, 106 



Gall mites, 302 



Gall wasps, 287 



Galls, 286, 288 



Gametes, 44, 86, 88, 140, 447, 531, 532 



Gametocytes, 88 



Gametogenesis, 107, 111, 140, 518 



Ganglia, 158, 159, 219, 239, 241, 297, 327, 444, 468 



Ganglionic synaptic nervous system, 445 



Ganoid scales, 347, 348 



Ganoids, 334, 344, 345, 515 



Ganoin, 348 



Gar pikes, 345 



Gars, 345 



Garter snakes, 481 



Gases, 9, 463, 503 



Gastraea, 267 



Gastral cavity, 128, 130 



Gastral layer, 130 



Gastric gland cells, 136, 277 



Gastropoda, 217, 218, 513 



Gastrostomus bairdii, 367 



Gastrovascular cavity, 135, 142, 158, 164, 438, 



544, 545 

 Gastrula, 119-123, 140, 149, 150, 198, 214, 236, 



315 

 Gastrulation, 119-122, 371, 449 

 Gavials, 388 

 Geckos, 383 

 Geese, 403-405 

 Gel, 12, 13 

 Gemmation, 86 

 Gemmules, 132 

 Gene mutations, 635 



Geneological tree (see Phylogenetic tree) 

 Generic names, 58, 546 

 Genes, 527-529, 531, 532, 534-537, 540 

 Genesis, 25 



Genetics, 5, 517, S27-540, 554 

 Genital atrium, 160, 161 

 Genital duct, 210, 212 

 Genital opening, 219 

 Genital pore, 167, 160, 161, 166, 168 

 Genotype, 528 

 Genotypic ratio, 632, 533 

 Genus, 58, 59, 542 



Geographical distribution, 5, 4f).9~/>09, 521 

 Geological ages, 512 

 Geological time scale, 611, 512 

 Geotropism, 55, 72, 74 

 Gephyrea, 242, 246 



Germ cells, 94, 95, 107-111, 149, 171, 448, 451, 517 

 Germ layers, 120, 121, 376, 435, 544-545 

 (See also Ectoderm; Entoderm; Mesoderm) 



Germ plasm, 94, 451, 517 



Germinal area, 376 



Germinal disc, 355, 356 



Germinal epithelium, 96 



Giant fibers, 239 



Giardia, 80 



Giardia lamblia, 80 



Gibbons, 422, 506 



Gila monster, 384, 389 



Gill arches, 313 



Gill chambers, 262, 253 



Gill filaments, 211, 351 



Gill rakers, 351 



Gill slits, 313, 317, 323, 336, 338, 352, 353, 373 



Gills, 210-212, 262, 253, 275, 351, 361, 372, 373, 



440 

 Girdles, 319 



Gizzard, 230, 232, 277, 393 

 Glacial lakes, succession, 481 

 Gland cells, 135, 136, 439 

 Glands, 439, 440, 466 



{See also Endocrine glands) 

 Glandular epithelium, 96, 97, 439 

 Glass snake, 383 

 Glenoid cavity, 321 

 Gliding, 398 

 Globigerina ooze, 82 

 Glochidium, 214 

 Glomerulus, 326 

 Glomus, 326 

 Glottis, 384, 408 

 Glowworms, 278 

 Glue cells, 155 

 Glycerin, 34 

 Glycogen, 323 

 Gnathostomata, 335 

 Goats, 416, 507 

 Gobies, 354, 358 

 Goblet cells, 97, 98 

 Golden plover, 403 

 Goldfish, 358 

 Golgi bodies, 30 

 Gonads, 106, 140, 148-150, 155, 210, 311, 313, 



317, 339, 366, 465 

 Gonangia, 160, 151 

 Gordiacea, 177, 181 

 Gordius, 181 

 Gorgonia, 147 

 Gorilla, 422, 506 

 Grafting, 163, 237 

 Grain moth, 285 

 Grantia ciliata, 129 

 Granular structure, protoplasm, 22 

 Graptolites, 513 

 Grassi, 90 



Gray matter, 327, 328 

 Grayfish, 343 



Great Barrier Reef, 152, 153 

 Greeks, 549 



Green glands, 252-254, 442, 466 

 Gregarina blattarum, 82 

 Gregarina poly morpha, 82 

 Gregarines, 83 

 Gregariousness, 494 

 Grosbeak, beak, 399 



