8o6 



PATTERNS AND PROBLEMS OF DEVELOPMENT 



in, 329; developmental field of, in chick 

 embryo, 531 



Heterochely, compensatory reversal of, 412 



Heteromorphosis: axial, in Tubtdaria, 315; 

 of reconstituting hydranth or head, 335 



Homeosis, in arthropods, 342 



Hydra: tentacle reconstitution in, 36; gradi- 

 ents in, loi; budding in, 313, 431; induc- 

 tion by implants in, 378; bud symmetry 

 in, 634, 721 



Hydro ides, compensatory reversal in, 41 1 



Ilyanassa: polar lobes of, 559, 560; centri- 

 fuged eggs of, 585 



Individuation, in amphibian induction, 475 



Indophenol blue reaction: as method, 64; in 

 Paramecium, 92; in echinoderm develop- 

 ment, 139, 140 



Induction: in general, 9, 485, 502; of amphib- 

 ian limb, 288; by dominant region, 307, 

 358; by lacerated partial section, 371; by 

 grafts in coelenterates, 378; by grafts in 

 planarians, 381; of regression by altered 

 dominance, 398; by implanted sea-urchin 

 micromeres, 440, 443 ; of amphibian neural 

 plate, 455, 459, 460, 462, 469, 485; ques- 

 tions of specificity of substance and effect 

 in, 461, 472, 473, 483, 485; amphibian neu- 

 ral development without, 462, 466; ex- 

 amples of homeogenetic, 469; by living 

 and dead amphibian tissues, 470; by tis- 

 sues and extracts in general, 471, 483; 

 effectiveness of, 472, 473; of amphibian 

 lens, 472, 488, 491 ; as activation, 472, 475, 

 478, 482, 485, 48^1, 496, 502, 503; influence 

 of host field in, 474, 483; in relation to or- 

 ganization, 475, 485; evocation and indi- 

 viduation in, 475; by chemical substances, 

 476, 478; glycogen and, 477; metabolism 

 and, 477; by methylene blue, 478; by fatty 

 acids, 479; in relation to host cytolysis, 

 479; in ascidians, 480; in teleosts, 481; in 

 birds, 483 ; by entoderm, 484; in mammals, 

 485; in normal development, 486; of chick 

 lens, 495; of optic parts, 495; of amphibian 

 ear, 496, 498; of otic capsule, 497; of tym- 

 panic membrane, 498; of amphibian bal- 

 ancer, 499; xenoplastic, of amphibian oral 

 region, 499; of amphibian gill, 500; and 

 "double assurance," 500. 6"ee a/^o Amphib- 

 ian dorsal inductor; Dominance, physio- 

 logical; Organizer; Pattern, developmen- 

 tal 

 Inductor, definition of, 9. See also Amphibian 

 dorsal inductor; Dominance, physiologi- 

 cal; Induction; Organizer; Pattern, devel- 

 opmental 

 Inhibition, differential: in general, 72, 166; 

 in Phialidiiim, 167, 425; in Corymorpha, 

 170; inplanarian, 175, 177; in echinoid de- 

 velopment, 199; in asteroid development, 



212; echinoderm exogastrula as, 235; in 

 experiments of Herbst, 240; in squid em- 

 bryo, 248; in insect embryo, 250; in ascidi- 

 an embryo, 250; in fish embryo, 256; in 

 frog development, 258; of amphibian noto- 

 chord, 264; in chick embryo, 265; by in- 

 jury of spermatozoa, 266; in hybrids, 267; 

 in inbred guinea pigs, 268; in inbred mice, 

 269; in ctenophore plate row, 327; of 

 heart, 329. See also Conditioning; Recov- 

 ery; Tolerance; Susceptibility, differential 



Insects : differential ovarian dye reduction in , 

 144, 671, 677; differential developmental 

 modification in, 250, 518; embryonic re- 

 constitution in, 514, 517, 518; Bildiings- 

 zentrum of, 515, 519, 520; differentiation 

 center of, 517, 521; developmental gradi- 

 ents in, 518; polyembryony in, 537; cen- 

 trifuged eggs of, 587; oogenesis in, 668 



Integration, physiological: in development in 

 general, i, 706; factors of, 8, 304, 330, 706, 

 709, 710. See also Dominance, physiologi- 

 cal; Induction; Pattern, developmental; 

 Reconstitution 



Isolation, physiological: in general, 11, 82; 

 factors and results of, 306; of plant vege- 

 tative tips, 311; in Tubidaria, 314; in rela- 

 tion to delayed section, 316, 319; in corals, 

 320; in planarian, 321; in Stenosfomum, 

 323; in annelids, 324; in segment forma- 

 tion, 327; functional, in ctenophore plate 

 row, 327; in heart, 328; in apical and 

 cephalic reconstitution, 333, 338, 357, 359; 

 in development of Polys pondylium, 640 



Lamprey: embryonic differential suscepti- 

 biUty of, 147; reconstitution of isolated 

 blastomeres of, 521 



Lens: regeneration of amphibian, 395; induc- 

 tion of amphibian, 472, 488, 491; develop- 

 ment of amphibian, 487; specificity in in- 

 duction of, 492; polarity of, 494; free de- 

 velopment of teleost, 494; induction of 

 avian, 495 



Lepto plana: reconstitution of, 46; dye-reduc- 

 tion gradient of, 119 



Light: in plant reconstitution, 420; inhydroid 

 reconstitution, 420; polarity determina- 

 tion in Fhcus egg by, 424; and localization 

 of parts in plants, 430; and pattern of 

 liverwort gemmae, 430 



Lithium, action of: on hydrozoan develop- 

 ment, 167; on echinoid development, 203, 

 206, 208; on asteroid development, 212, 

 216, 219; in echinoderm exogastrulation, 

 221, 223, 226, 227, 229, 230; locally spe- 

 cific or differential, 227, 233, 234, 235, 241, 

 243, 263; on frog development, 258, 263; 

 on amphibian notochord, 264; on scale of 

 sea-urchin organization, 357, 440, 445, 507 



Loligo, difl'erential inhibition in, 248 



