464 



INDEX 



Galileo, 387 



Gallapagos Islands, 369 



Gallbladder, 148, 149, 155 



Galton, 301, 303, 404 



Gallon's Laws, 269-271, 303 



Gamete, 54, 112, 228-230, 236; 

 formation, 94-96; evolution of, 

 237 (see Egg and Sperm) 



Gametophyte, 64, 101, 105; fe- 

 male, 106, 110} male, 106, 110 



Ganglion, 133, 185, 191 



Ganong, W. F., 61, 111 



Gastric juice, 157, 158 



Gastric vacuole, 40 



Gastroliths, 131 



Gastrula, 57, 58, 156, 252 



Geddes, P., 307 



Gel, 8 



Gene, 236, 280, 286, 377; altera- 

 tion of, 298; modifying, 304; 

 multiple, 285, 286; segregation 

 of, 290 



Genetics, 4, 261-306; history of, 

 403-406 



Genital duct, 137 



Genotype, 275, 277, 279, 281 



Genus, in classification, 349 



Geological time table, 356 



Geomelrid Moth, larva, 322 



Germ cells, 215, 229; origin, 223- 

 242; primordial, 224 



Germ layer, 58, 128; theory, 403 



Germ plasm, 222, 265, 377, 404 



Germinal continuity, 216, 222, 

 264, 265, 377, 404 



Gesner, 384 



Gill, 175; pouches, 155, 169; slits, 

 137, 147, 164, 366 



Giraffe, 266 



Gizzard, of Earthworm, 123] of 

 Bird, 151 



Gland, Cowper's, 152; diagram 

 of, 159} ductless, 159] endo- 



crine, 159; oil, 151} prostate, 

 152} salivary, 159; sebaceous, 

 139] sweat, 139, 176; thymus, 

 150, 152, 155, 159; thyroid, 

 152, 155, 159, 182; unicellular, 

 59, 158 



Glossary, 429-455 



Glottis, 149, 150, 151 



Glucose, 13, 36 



Glycerine, 14 



Goethe, 410 



Goitre, 182 



Gonad, 137, 164, 179, 203 (see 

 Ovary and Testis) 



Gorilla, skeleton of, 354 



Grafting, 221 



Grape, 70 



Grape sugar, 87 



Grass, 65, 70 



Greek natural philosophers, 345- 

 406 



Greek science, 2, 379-382 



Green gland, 131 



Green plants, 30-38 



Gregarious animals, 331 



Grew, 388 



Growing point, 76, 79, 81, 82, 87 



Growth, by accretion, 16; by 

 intussusception, 11, 16, 19 



Growth zone, 78 



Guard cells, 22, 83 



Gulfweed, 63 



Gullet, 40 



Gymnura, 315 



H 



Hair, 139] character, inheritance 



of, 278 

 Hales, 397 

 Haller, 395 



Haploid number, 229, 234, $35 

 Harvey, 161, 243, 385, 386, 389, 



394, 401 



