726 



Index 



Epigenesis, Harvey, views on, 4, 

 5, 6, 12 



influence of microscope on, 7, 8 



Wolff and, 7, 8, 11,21 

 Equipotentiality of ear ectoderm, 



415, 419 

 Erythroblastosis, 702 

 Erythrocytes, isoagglutinogens of, 

 563 



mosaicism of, 566 



nature of, 452, 453 



source of, 452 

 Evocation, 259, 270, 280 

 Evolution, biogenetic law and, 15, 

 16 



Darwin and, 13, 14, 15, 16, 17, 

 18 



embryology and, 13-22 



Haeckel and, 15-17, 18, 21 

 Excitability, thresholds of, 363 

 Excitation, conduction of, 350 

 Exogastrulation, 224, 226, 235- 



237, 707 

 Explants, 350 



from M-cell region, 379 

 External genitalia, castration ef- 

 fects on, 483 

 sex hormone action on, 482 

 Eye, 380, 383, 386 



growth of, 407-409 



growth adjustments of, 408, 409 



initial size of, 407, 408 



muscle size of, 409 



orbit size and, 409 



organogenesis of, 402-414 



regeneration of, 409-412, 690, 

 693 



size relation of, 628 



transplantation of, 358 



See also Cornea, Lens, Retina. 

 Eye-forming area, 307 



Fasciculation, 361, 366-367, 368, 



380, 382, 384 

 Fat as energy source, 533, 534, 



535, 538 

 Fate maps of gastrula, 234, 235, 

 301, 302, 303, 305 

 of heart, 441 

 of neurula, 247 

 of wing bud, 437 

 Feather, dermal papilla as induc- 

 tor of, 509 

 development of, 507, 508, 509 

 regeneration of, 689 

 Feather germ. See Feather pa- 

 pilla. 

 Feather papilla, dermal compon- 

 ent of, 504 

 development of, 507, 508, 



509 

 induction of, 509 

 melanoblast invasion of, 504 

 mutational change of, 515 

 reaction gradients of, 515 



Feather papilla, response to hor- 

 mones, 507, 514, 515 



time-space order of, 506 

 Feather tract, 506, 507, 514, 515 

 Fertilization, 181-201 



antifertilizin role in, 193-194 



block to polyspermy in, 194 



cones of, 195 



cortical change in, 194 



electrical changes upon, 197 



fertilizin-antifertilizin action 

 in, 193-194 



fertilizin role in, 193-194 



lytic agents in, 194 



membrane elevation in, 195- 

 196 



metabolic changes upon, 197- 

 199 



permeability changes upon, 197 



pronuclei union upon, 199-201 



protein solubility change upon, 

 196 



shape-volume change upon, 196 



specificity of, 193-194 



viscosity change upon, 196 

 Fertilizin, 185-189 



chemical nature of, 188, 189 



function of, 193-194 

 Fertilizin-antifertilizin reaction, 



194 

 Fetal cortex (adrenal), 586, 587 

 Fibers, cutaneous, 385 



nerve. See Nerve Fibers. 

 Fibrin, 352, 353, 356 

 Fibrinolytic agents, 353 

 Fibrogenesis, 51-52 

 Fibrous systems in cells, 46 

 Fibrous units in nerve orientation, 



352 

 Field of thyrotrophic substance, 



583, 654 

 Fields, 370, 378 



in amphibian regeneration, 677, 

 678 



definitive position and restric- 

 tion of, 312 



dendritic, 356. 382 



denervated, 365 



of ear, 415 



electric, 350, 356 



gene action on, 165-166 



heart-forming, 310, 441 



of lower germ layers, 309-311 



mosaic of, 370, 375 



nephros-forming, 310 



for notochord-somite formation, 

 309 



See also Morphogenetic fields. 

 Forelimb, disc of, 431, 432 



duplication of, 435 



location of, 432 



normal development of, 429- 

 431, 437 



as self-differentiation system, 

 431 



Forelimb. See also Wing bud. 



Forelimb and girdle, organogen- 

 esis of, 429-439 



"Formative turgor," 364 



Freemartin, 475, 477, 483, 593, 

 594 



Functional differentiation and en- 

 zyme development, 545-548 



Functional localization, 387 

 in brain cortex, 388 



Fusion of amphibian eggs, 233 

 of teleost eggs, 298 



Galvanotropism, 356 

 Gametes as teratogenic factors, 

 711 

 life span of, 182-185 

 Ganglia, 347, 354, 373, 381, 



383 

 Gastrula, fate maps of, 234, 235, 

 301, 302, 303, 305 

 isolation experiments on, 238- 



241 

 organization of, 238-243 

 Gastrulation, 223-227, 234-235 

 cell movements in, 225 

 cell number in, 224, 225 

 cell shape in, 224, 226 

 forces of, 226-227 

 mechanisms of, 224—227 

 partial 236, 237 

 in teleosts and birds, 300-306 

 types of, 223 

 Gene action. See Genie action. 

 Generation, Aristotle's epigenesis 

 and, 3 

 contribution of male and fe- 

 male in, 2 

 Fabricius, influence of, 4 

 Harvey's views on, 4, 5. 6 

 part formed first in, 2, 3, 4 

 theories of the Greeks on, 1-3 

 Genes, differential response of, 1 64 

 Genetic asymmetries, 161-163 

 Genetics and embryology, 25, 28, 



32 

 Genie action, 151-166 



auto-antibody concept and, 



568 

 in developmental processes, 



159-161 

 embryonic fields and, 165- 



166 

 site of, 159-161 

 with substrate. 164 

 time of, 155-157 

 type of, 157-159 

 Genie content, differentiation and, 

 163-166 

 qualitative variability of, 



153-155 

 quantitative variability of, 

 152-153 

 Genital ridge, formation of, 473 

 sterility of, 473 



