SUBJECT INDEX 



505 



echinoderms, determination, 92 



maturation, 33 

 ectoderm, 7, 67, 218 

 ecto-mesoderm, 256 

 eggs, mosaic and regulation, 63, 97, 103, 



115. 173 

 orientation in ovary, 43, 106 

 egg-membranes, 38 

 electron microscopy, 31, 10 1, 370 

 endoderm field, birds, 184 

 endoderm formation, amphibia, 164 

 birds, 59, 155, 161, 167 

 comparative, 244 

 fish, 226, 227 

 mammals, 236 

 reptiles, 234 

 energy sources, 40, 453 



morphogenetic, 203, 453 

 entelechy, 83 



enzymes, adaptive, 286, 388, 400, 

 409 

 and genes, 378s 

 inhibitors, 203, 454 

 microsomes, 370 

 mosaic eggs, loi, 102, 114 

 epiblast, 156, 167 

 epidermis, 258 

 epigenetics, 10 

 comparative, 246 

 crisis, 135, 329, 342 

 landscape, 351 

 Epilobium, 392 

 epimorphosis, 302 

 euchromatin, 367, 3S2 

 evocation, 16, 17, 177, 188, 366, 412 

 regional, 215 

 serial, 388, 398 

 evocators, 193s 

 activation, 196s 

 and cell surface, 413, 447 

 diffusion, 213, 269, 465 

 indirect, 198, 274 

 natural, 213, 217 

 evolution, 9 



on to land, 39 

 exogastrula, 83, 87, 442 

 eye, 211, 254s, 258, 284, 289, 298 

 colours, 337 



fate-maps, amphibia, 158s 



ascidians, 109 



birds, 159 



comparative, 161, 242s 



cyclostomes, 224 



fish, 226s 



mammals, 237 



reptiles, 235 

 feathers, 258, 308, 417 

 feed-back, 407 

 female-steriles, 43, 135, 246 

 fertilisation, 6, 45s 

 fibres, cytoplasmic, 438, 444 

 fields, 16, 17, 23s, 103, 192, 272, 395, 411, 

 416, 431 



cortical, 152 



organiser, 177 



reduction, 465 



regeneration, 309s, 321 

 flask cells, 439, 444 

 flatvirorms : see planarians 

 flower colours, 381 

 follicles, 37, 258, 342 

 food reserves, 39 



forces of gastrulation, 170, 203, 437s, 425s 

 foregut, 251, 261 

 formalin, 217 



formation centre, 125s, 128, 132, 351 

 fragments, anuclear, 55. 9° 

 function and form, 277 



gamones, 46 

 ganglia, 256, 258 

 gastrulation, 7 



comparative, 242 



movements, 163s, 167s, 170s, 203, 229, 

 244, 434, 437s, 440, 448 

 genes, activation, 21, 348s, 412 



and basic structure, 19 



definition, 371 



and enzymes, 19, 20, 378s 



homeotic, 340 



homodynamic, 347 



immediate products, 348, 385, 406s 



inactivation, 308, 361 



ledials, 342, 354, 3^3 



local action, 362, 426 



motthng, 375 



