5^2 



INDEX 



Selachians, cleavage, 39 



endolymphatic duct, 31 



extra-embryonic blastoderm, 327 

 self-diflferentiation {see also mosaic 

 development), 53 f., 70, 188, 196 



eye, Bombinator, 48 



eye, chick, 201, 204 



eye, Rana, 248 



limb-joint, 228 



mesonephros, chick, 207 



metanephros, chick, 200 



wing-cases, silkworm, 206 

 sensory load, 383, 385 

 sex-cords, 263 



sex-differentiation, 254 f., 409 

 sex-hormones, 259 

 sex-induction, 256 

 sex-reversal, 409 

 shape-genes, gourds, 416, 417 

 sheath, nerve-, 393 



sheep, growth-gradient, 367, 370, 414 

 shell-growth, 368 

 shoulder-girdle, Amblystoma, 231 

 silkworm, maternal inheritance, 412 



self-differentiation, 206 

 simple components, 9 

 sinews, differentiation, 174 

 situs inversus, 73, 74, 75, 234 

 size, and limb-differentiation, 418, 419 

 skeleton, chick, explanted, 205 



pluteus, 174, 181, 405 



regeneration, Triton, 304 



vertebrate, adjustment, 175 



vertebrate, determination, 434 

 skin, regeneration, 304 

 snails, cytoplasmic factors, 405 

 sodium thiocyanide, effects of, 337 

 somatoblasts, 113, 172, 496 

 somites, 20 f. 

 space-lattice, 71 

 specific attraction (nerve), 393 

 sperm-entry, 36, 67, 320 

 Sphaer echinus, centrifugalisation, 221 



larval hybrids, 405 

 Sphodrojnantis, antenna-regeneration, 



361 

 spinal cord, 30, 373, 382, 388 

 spiral cleavage, 72, 108, 117 

 spleen, mosaic development, 199 

 sponge, reconstitution, 65, 250, 281, 



282 

 spurs, fowls, 269 

 stag-beetle, growth-gradient, 422 



growth-profile, 367 



starfish, see Asterina, Patiria 

 starvation, Planarian, 368 

 Stenostomum, differential inhibition, 



294,. 295 



Sternaspis, polarity, 62 

 stomodaeum, amphibian, 31, 179 



sea-urchin, 102, 166 f. 

 stratification, 66, 123, 217 

 striated muscle, 33 



function, 432 

 Styela, blastomeres isolated, 97, 99 



centrifugalisation, 67, 123, 125 



mosaic development, 99, 125 



organ-forming substances, Il8, 124, 

 217 



partial larvae, 123 



polarity, 67 



prelocalisation, 119 



yolk, 67 

 Stylaria, head, organiser, 166 

 sucker, Anuran, heteroplastic grafts, 



142, 143 

 susceptibility (see also differential 

 susceptibility), 67, 86, 88, 301, 



309, 331 



Sycon, reconstitution, see sponge, 

 reconstitution 



symmetry, 15, 36, 53, 56, 67, 79, 119, 

 126, 139 



sympathetic nervous system, limb- 

 regeneration, 198, 420 



tail, lateral line on, 355, 356, 357 



mosaic development, 197 



regeneration, 272, 365, 372 

 tail-field, 362, 363, 365 

 tail-formation, Urodele, 28, 29 

 tail-graft, nerve-attraction, 392 

 tail-induction, 145, 193, 487, 490 

 tail-muscles, 28, 30 

 tail-organiser, 492 

 tail-region, dependence, 283 

 tapetum, determination, 244, 249 

 taste-buds, Ayniurus, 174, 431 



endodermal origin, axolotl, 487, 498 

 teeth, horny, heteroplastic grafts, 142 



true, origin of, 487, 498 

 teleosts, neural tube, 182 



thyroid tumours, 392 

 Telmessus, growth-gradient, 368 

 temperature, sex-differentiation and, 



256, 263 

 temperature-gradient, 39, 137, 138, 

 338, 339, 340, 341, 342, 343, 494 



