NDEX 



507 



kidney-tubules, 20, 32, 152, 193 

 killed organiser, 153, 163, 497 

 knitting, 436 



labile determination, 49, 50 t., 94, 136, 



137, 140, 187, 268, 373, 492 

 Lamellibranch, centrifugalisation, 218 



cleavage, 108 

 larva, 13 



larval hybrids, 404, 408 

 late fertilisation, 95, 261 

 lateral half-embrvo, Triton, 52, 53, 



86 f. 

 lateral line, 31, 56, 355, 356, 357, 431 

 lateral plate mesoderm, 20, 22, 28 

 Lebistes, melanophore-multiplication, 



426 

 leech, cleavage, 72, 113 



double monsters, 114 



prelocalisation, 119 

 left-right axis, 79 

 leg-field, Ambly stoma, 224, 230 



Triton, 362 

 lens, 30 



connective tissue capsule, 392 



dependent differentiation, 55, 183 f. 



formation from optic cup, 187, 188, 



237 



grafts, 145 



self-differentiation, 184, 185 

 lens-fibres, 188 

 lens-field, 187, 189, 238 

 lens-growth, and eye-growth, 422, 424 

 lens-regeneration, 187, 237 

 Lepidoptera, self-differentiation, 206 

 light, 38, 60 

 limb, growth-coefficients, 206, 421 



induction of, 177, 193, 231, 363 



mosaic development, 198 



regeneration. Amphibia, 198, 271 f., 

 273, 304, 306, 307, 420 



regeneration. Arthropods, 303, 361 



sheep, growth, 367, 414 

 limb-bud, chick, explanted, 205 



chick, subregions, 225, 226, 227, 228 



differentiation and size, 418, 419 



grafts, 364 

 limb-determination, Amhlystoma, 56, 



224 

 limb-field, 222 f., 276, 299, 306, 307, 



311 

 limb-forming potencies, 231 

 limb-innervation, Ambly stoyna, 389, 

 390 



limb-joint, self-differentiation, 228 



limb-rotation, 232 



limb-rudiments, insect, explanted, 174 



Liitmcea, asymmetry, 81, 411 



limpet, cleavage, 114 



lithium, effects of, 181, 323, 336, 337 



liver, 32 



differentiation, chick, 179 

 liver-extract, fibroblast-metaplasia, 213 

 liver-rudiment, amphibian, explanted, 



203 

 lizard, regeneration, 365 



tail-induction, 362 



tail-scale regeneration, 372 

 localisation, 271 

 logarithmic spiral, 369 

 lower layer, blastoderm, bird, 159 f. 

 Lumbriculiis, regeneration, 308 



susceptibility-gradient, 277 

 Lymafitria, intersexes, 172 



rate-genes, 409 

 Lytechiniis, cleavage, 85 



larval hybrids, 408 



polarity, 313 



regulation, loi 



macromeres, Beroe, 105 



Deyitalium, 109 



sea-urchin, 102, 104, 323 

 macrophages, 213, 214, 215 

 Macropodus, differential acceleration, 



344, 345 

 Maia, chela-growth, 370 

 mammals, gonad-differentiation, 264 



intersexual, gonad-asymmetry, 362 



organ-rudiments, chorio-allantoic 

 grafts, 201 



plasticity, 100 



trophoblast, 327 



twinning, 329 

 mammary gland, 179 

 man, thyroid requirements, 425 



twinning, 329 

 Mantis, antenna-regeneration, 361 

 "marginal zone", 41 f. 

 " mass-movements ", 43 , 25 1 , 481, 482 

 "mechanistic" explanations, 10 

 medulla, gonad, 254 

 medulla oblongata, 385, 386 

 megacephaly, 334, 338, 339, 345, 



346 

 melanophore-expansion, 425 

 melanophore-multiplication, 426 

 membrane, egg-, 13 



