506 INDEX 



head, Planarian, 165, 166, 167, 372 

 head-organiser, 144, 146, 147, 492 

 heart, amphibian, 20, 32 



asymmetry, 73 f., 74, 75, 234 



chick, and Hver-differentiation, 179 



function, 432 



morphological differentiation, 249 



self-differentiation, Bombinator, 203 



situs inversus, 75, 76 f., 234 

 heart-field, 233, 234, 235 



polarity, 360 

 heart-rudiment, Urodele, 78 

 hereditary factors, 15, 397 f- 

 heredity, 8, 59, 397, 43^ 

 hermaphroditism, 259 

 hermit-crab, growth-profile, 367 

 Hertwig's rule, 83 

 heterogenetic induction, 145 

 heterogony, 366 



heteromorphosis, serial, 360, 361 

 heteroplastic grafts, 42, 161, 164 f. 

 hind-limb field, Amblystojna, 224, 230 

 histo-differentiation, see histological 



differentiation 

 histological differentiation, 33, 204, 



249, 267, 375, 440 

 histolysis, operculum, frog, 428, 429 

 holoentoblastula, 334 

 homoiogenetic induction, 145 f., 148, 



161, 193, 396 

 "homunculus", 2 

 hormones, 173, 177, 190, 396, 425, 437 



sex-, 270 



susceptibility and growth-rate, 370, 

 428 

 horns, sheep, growth of, 370 

 host-tissues, influence of, 147, 150 

 house-fly, precocious chemo-differen- 



tiation, 127 

 Hydra, organiser, 164, 165 



polarity, 280 

 hydrocoel, 73, 81, 180 

 hydrodynamics, blood-vessels, 434 

 Hydroids, differential inhibition, 292, 



425 



isolated blastomeres, 96 



polarity, 63, 64 



reconstitution, 65, 66, 281 

 Hyla, lens-differentiation, 186 

 Hymenoptera, polyembryony, 328 

 hypochordal rod, 21, 183 

 hypophysis, 31, 33, i79 



mosaic development, 198 

 hypostome. Hydra, 164 



Ilyanassa, centrifugalisation, 122 



cleavage, I2i 



polar lobe, 113, 120, 121, 122 

 imaginal discs, explanted, 174 

 Inachiis, chela-growth, 370 

 individuation-field, 162, 310, 319 

 induction, heterogenetic, 145 



homoiogenetic, 145, 148,161,193,396 



secondary, 57 

 inductive capacity, Corymorpha, 290, 

 291 



Planarians, 286 



Sabella, 288, 289 

 " infective "organiser-capacities, 151 f. ; 



mouth-region, 498 

 infundibulum, 33, 179, 245 

 inhibition, 292, 297, 301, 325 



of gonad-cortex, 256 



Harenactis , 300 



of lens-formation, 238 



of sex-differentiation, 258 

 innervation, 389, 390, 393, 486 

 insect, activating centre, 170 



cleavage, 126 



cleavage, nuclear equivalence, 88 



differentiating centre, 171 



differentiation, 252 



dorso-ventral axis, 69 



holometabolous, differentiation, 437 



rudiments, explanted, 173 

 integration, 57 

 intermediate cell-mass, 32 

 interplantation, 138, 209, 314, 315, 316 

 intersexuality, mammals, gonad-asym- 



metry, 362 

 intersexuality, Lymantria, 172 

 intestine, 32, 203, 485 

 intra vitam staining, 21, 394, 495 

 invagination, 16, 17, 19, 41, 95 

 inversion of frog's egg, 38, 94, 152 

 invertebrates, organisers, 64 f. 

 isogony, 367 



isolated blastomeres, 96 f. 

 isolation, physiological, 296, 325 



jelly-fish, differential inhibition, 425 

 joint, limb-, differentiation, 228 



keratinisation, 209 



kidney, amphibian, explanted, 203 

 chick, explanted, 200, 207 

 compensatory hypertrophy, 431 



kidney-epithelium, redifferentiation, 

 179, 211 



