8o8 PATTERNS AND PROBLEMS OF DEVELOPMENT 



292, 362, 437, 552, 558, S6i, 579> 597; visi- 

 ble evidence of, in embryonic develop- 

 ment, 53; experimental methods of analy- 

 sis of, chap, iii; differential modification 

 of, 72, chaps, V, vi, vii, 723; experimental 

 determination of Fucus, 86, 423 ; of echino- 

 derms, 129, chap. vi. 376, 583, 677, 739; of 

 moUusks, 143, 549, S5i; of ascidians, 145, 

 577, 580; of lamprey, 147; of teleost fishes, 

 149, 451, 452; features of amphibian, 151; 

 avian, 159, 43 i, 432, 433, 434, 688; of 

 mammalian alimentary tract, 164, 329; 

 experimental obliteration of, 168, 201, 

 202, 208, 215, 216, 225, 228, 231, 259, 540; 

 regression of, 170, 398, 399; and metabo- 

 lism, 280, 281, 446, 477, 702, 704; of am- 

 phibian limb, 285, 370, 390; of harmoni- 

 ous-equipotential systems, 290, 505; dy- 

 namic character of, 298; dominance as 

 feature of, chaps, ix, x, xi, 713; progressive 

 determination of, 332; scale of organiza- 

 tion of, 342, 644; initiation of, in recon- 

 stitution, 359, 371, 376, 390; of appendage 

 reconstitution, 369; induction of, m coe- 

 lenterates, 371, 378; mirror-imaging of, 

 387, 693; in relation to o.xygen, 413; in 

 cell aggregates, 418, 419, 636; determina- 

 tion of, by electric current, 421; in rela- 

 tion to gravity, 422; maps of, amphibian, 

 447, 448, 449, teleost, 451, chick, 452, 453, 

 454, 531, 532, 533, 534; effect of tempera- 

 ture gradient on, 463; in amphibian exo- 

 gastrula, 463, 464, 465; of amphibian host 

 and implanted inductor, 467; as organizer, 

 485; and neural inductor, 485; origin of 

 lens, 494; and double assurance, 500; and 

 induction in general, 502; of insects, 515; 

 in polyembryony, 536, 537, 539, 690; i" 

 armadillo quadruplets, 539, 690, 693; and 

 spiral cleavage, 544, 554, 562; polar lobes 

 in relation to, 551, 559; of ctenophore, 

 563; of Ascaris, 568, 572; of entomostra- 

 cans, 574; of Amphioxus, 582; in relation 

 to egg cortex, 588; effect of pressure on, 

 589; of dispermic and polyspermic eggs, 

 593; origin of, in plant spores, 599; of 

 sporozoa, 604, 605, 606, 607; suctorian, 

 609, 610, 613; of Noctiliica swarm spores, 

 615; asymmetrical protozoan, 617, 627; 

 of plant spermatozoids, 618; of animal 

 spermatozoa, 622 ; of bryozoan statoblasts, 

 63s; of Polys pondylium, 637; of diatoma- 

 ceous pseudothallus, 641 ; of pileus in fun- 

 gi, 641; of bryophytes, 647; of pterido- 

 phytes, 647; of gymnosperms, 651; of an- 

 giosperms, 652; of animal oocytes and 

 eggs, 657; symmetry and asymmetry in 

 embryonic, 672, 675, 677, 679; genetics of 

 asymmetric, 680, 691, 700, 701; and 

 crystalline pattern, 695; and optical iso- 

 meres, 696; and protein molecular con- 

 figuration, 697; of flowing stream, 699; as 

 primarily gradient pattern, 700, 703; most 



primitive form of axiate, 702; fundamental 

 identities of, 703; and "inachines" of 

 Driesch, 703; initiation and reaction in, 

 704; susceptibility of, 705; integrating 

 factors of, 706; in relation to growth, 716; 

 in evolution of form, 724. See also Asym- 

 metry; Buds; Conditioning, differential; 

 Dominance, physiological; Dorsiventrali- 

 ty; Field, developmental; Gradients, con- 

 centration; Gradients, physiological; In- 

 duction; Inhibition, differential; Isolation, 

 physiological; Metabolism; Organizers; 

 Pattern, ultrastructural; Reconstitution; 

 Recovery, differential; Scale of organiza- 

 tion; Susceptibility, differential; Symme- 

 try; Tolerance, differential; Ventrodor- 

 sality 

 Pattern, ultrastructural: in relation to de- 

 velopmental pattern, 5, 281, 296, 333, 389, 

 389, 394, 629, 631, 694, 701, 702; as a 

 reaction, 629; in relation to differentiation, 

 630; of cell walls and surfaces, 631; in 

 protoplasmic products and structures, 

 694; crystalline, 695, 698; of protein con- 

 figuration, 697; and specific asymmetries, 

 699; of flowing stream, 699; and growth of 

 nerve fibers, 708 

 Pennaria: gradient pattern in, 38, 104; elec- 

 tric-potential difference in, 103 

 Permeability, differential, 76 

 Pheretima, physiological gradient of, 122 

 Phialidium: gradients in egg and early stages 

 of, 96; differential developmental modifi- 

 cation in, 167; obliteration and determina- 

 tion of polarity in, 425; oocytes of, 659 

 Pileus, axiate pattern in, 642 

 Planarians: fission in, 41, 321; reconstitution 

 and body-level in, 108, 368, 729; differen- 

 tial inhibition in, 175, 177, 181, 183, 190, 

 193; differential conditioning and recovery 

 in, 176, 190, 195; asymmetry of head in, 

 193; conditions for head reconstitution 

 in, 193, 400, 406, 408; reconstitution field 

 in' 278; dedifferentiation in, 301; bipolar 

 and multipolar forms of, 303, 366, 367; 

 original nervous system and head regener- 

 ation in, 339; scale of organization in re- 

 constitution of, 349, 357; reconstitution in 

 acephalic forms of, 362; apolar forms of, 

 364; reconstitution of lateral pieces of, 365 ; 

 induction by grafts in, 381 ; delayed section 

 and head regeneration in, 408 

 Pliimularia, oxygen and reconstitution of, 413 

 Polar lobes: of annelids and moUusks, 551; 

 in relation to developmental pattern, 559; 

 effect of removal of, 559 

 Polarity, physiological: as a serial order, 4; 

 progressive determination of, 332; of nu- 

 cleus, 645. See also Dominance, physio- 

 logical; Gradients, physiological; Pattern, 



