INDEX 



809 



developmental; Reconstitution; and other 

 subjects designated under these heads 



Polyembryony: in bryozoa, 536; in insects, 

 537; in vertebrates in general, 538; in ar- 

 madillo, 539, 690; in spermatophytes, 654. 

 For experimental forms of, see Reconstitu- 

 tion 



Polyspondylium, development of axiate pat- 

 tern in, 637 



Potato, axiate pattern in tuber of, 88 



Potencies, developmental: definition of, 81; 

 methods of analyzing, 81; and differentia- 

 tion in field, 277, 288; maps of chick, 531, 

 532, 533, 534; in relation to spiral cleav- 

 age, 555; of ctenophore egg and embryo, 

 565; of ascidian egg and embryo, 577. See 

 also chaps, v, vi, vii, xi, xii, xiii; Pattern, 

 developmental; Reconstitution 



Potentiality, definition of, 81 



Pseudo-exogastrula, of echinoderms, 232 



Pseudothallus, diatomaceous, 641 



Rana: embryonic differential susceptibility 

 of, 151, 743; embryonic metabolism of, 

 153; lens induction in, 488; otic induction 

 in, 496; gray crescent of, 657, 684; circu- 

 lation and egg axiate pattern of, 663; em- 

 bryonic dorsiventrality of, 684, 686; em- 

 bryonic asymmetry of, 692 



Reconstitution: definition of, 28; types of, 30; 

 in Acetabularia, 31; in Marchantia, 32; in 

 relation to body-level, 34, 36, 41, 47; and 

 degree of injury, 49; after oblique section, 

 50, 326; differential modification of hy- 

 droid, 172; differential modification of 

 planarian, 175; dedifferentiation in, 301; 

 dominance and physiological isolation in 

 hydroid, 314; delayed section in, 316, 

 408; apical and cephalic independence 

 in, 333, 335, 33^, 339, 358, 359, 362;^ in 

 Lumbriculus, 337; scale of organization 

 in hydroid, 344; scale of organization 

 in planarian, 349; scale of organization 

 in annelid, 355; new patterns in, 359, 

 371-372, 376, 378, 381; bipolar and 

 multipolar, 359, 364; pattern in early 

 embryonic, 374; in embryo and adult, 376; 

 induction of, by grafts, 378, 381; mirror- 

 imaging in, 387; of amphibian lens, 395; 

 inhibition of, by altered dominance, 399; 

 in relation to oxygen, 413, 420; induced by 

 implanted sea-urchin micromeres, 440; 

 of amphibian dorsal inductor, 462; of 

 extraembryonic inductors in teleosts, 482; 

 of avian inductor, 483; of hydroid blasto- 

 meres, 504; of parts of sea-urchin embryo, 

 505; embryonic ventrodorsal in sea urchin, 

 512; in insect embryos, 514; of isolated 

 fish blastomeres, 521 ; of isolated amphibi- 

 an embryonic parts, 523, 526; absence of, 

 in amphibian tail bud, 527; of isolated 



parts of chick embryo, 528; in polyembry- 

 ony, 536; in embryonic and larval fusions, 

 540; embryonic, in forms with spiral 

 cleavage, 555, 559; embryonic, in cteno- 

 phores, 566; after blastomere dislocation, 

 589; embryonic, after Ca-free sea water, 

 592; in relation to ultrastructure, 698 



Recovery, differential: in general, 74, 166; in 

 planarian reconstitution, 190; after differ- 

 ential inhibition in sea urchin, 204, 507; 

 after differential inhibition in Patiria, 216, 

 221 ; in echinoderm exogastrulae, 230, 235, 

 238; in "animalized" Dendraster larvae, 

 245; in amphibian embryo, 262; in cteno- 

 phore plate row, 328. See also Condition- 

 ing, differential; Inhibition, differential; 

 Tolerance, differential 



Redifferentiation, definition of, 30. See also 

 Dedifferentiation; Differentiation; Recon- 

 stitution 



Reduction, differential: of KMn04, 63, 64, 

 96, 145; of vital dyes, 67, 90, 94, no, 119, 

 124, 133, 134, 137, i43> 144, 156, 159, 162 



Regeneration, definition of, 31. See also Re- 

 constitution 



Regression: in hydroids, 170, 398; of fission 

 zones, 398. See also Dedifferentiation 



Respiration: methods of determining, and 

 complicating factors, 58, 729, 731; differ- 

 ential susceptibility in relation to, 75, 736; 

 significance of planarian data on, 730, 731. 

 See also Carbon dioxide production; Gra- 

 dients, respiratory; Metabolism; Oxygen 

 uptake; Susceptibility, differential 



Sabella, reorganization in reconstitution of, 

 355- 368 



Scale of organization: in planarian reconsti- 

 tution, 45, 349; in echinoderm exogastrula, 

 237; in "animalized" and "Vegetalized" 

 echinoderm larvae, 243; as spatial order 

 of magnitude of pattern, 343; in relation 

 to dominance, 344; in Tubularia reconsti- 

 tution, 344; in Corymorpha reconstitution, 

 345; in nemertean and annelid reconstitu- 

 tion, 355, 555; alteration of, by lithium, 

 357; in embryonic sea-urchin reconstitu- 

 tion, 357, 440, 445, 507, 513; and localiza- 

 tion of parts, 358 



Scyphozoa. See Haliclystus 



Sea urchin : physiological gradients in egg and 

 early development of, 130, 133, 134, 136, 

 137; differential developmental modifica- 

 tion in, chap, vi, 439, 506; apical partial 

 forms of, 357, 439; alteration of polarity 

 of, 376; cleavage of, 438; embryonic re- 

 constitution in, 438, 505, 508, 509, 511, 

 512, 587, 591; induction by implanted mi- 

 cromeres in, 440; early embryo of, as har- 

 monious-equipotential system, 505; re- 

 constitution of combined blastomeres in, 



