INDEX 



807 



Liimhriciilus: oxygen uptake of, 121; differ- 

 ential susceptibility of, 126; differential in- 

 hibition in, 247, 368; fragmentation in, 

 326; reconstitution from partial trans- 

 verse section in, 337 



Lytechinus, experimental alteration of polar- 

 ity in, 376 



Macromeres: of sea urchin, 438; in spiral 

 cleavage, 545; of ctenophores, 564 



Mammals: intestinal gradient of, 56, 164, 

 329; developmental pattern of, 163, 689; 

 polyembryony in, 539, 690 



Maps, of presumptive regions and cell move- 

 ments and of potencies: amphibian, 447, 

 448, 449; teleost, 451; chick, 452, 453, 454; 

 of chick developmental potencies, 531, 532, 

 533. 534 



Marchantia: reconstitution of, 32; external 

 factors and gemma pattern in, 430 



Metabolism: methods of determining respir- 

 atory, 58; vital dyes in relation to, 67; 

 and differential susceptibility, 70, 736; and 

 electric potential, 78; and concentration 

 gradients, 164, 241, 272, 432, 513, 702, 

 704; and developmental pattern, 280, 281, 

 702, 704; and formative substances, 292; 

 in differentiation of gradient pattern, 297; 

 in amphibian induction, 472, 477; and 

 ultrastructural pattern, 696, 697, 698; 

 and substrate, 705. See also Carbon di- 

 oxide production; Gradients, physiologi- 

 cal; Gradients, respiratory; Oxygen up- 

 take; Pattern, developmiental; Suscepti- 

 bility, differential 



Micromeres: formation of sea-urchin, 438; in- 

 duction by implanted sea urchin, 440, 443 ; 

 in spiral cleavage, 545; of ctenophores, 564, 

 566 



Mirror-imaging: in bipolar forms, 387; in Ha- 

 renactis, 387; in Brnchdreifachbildungen, 

 388; in reduplicated amphibian limbs, 390; 

 in armadillo quadruplets, 693 



Mollusks: developmental pattern of, 143; lar- 

 val differential inhibition in, 248; cleav- 

 age of, 549, 564; polar lobes of, 551; cleav- 

 age and asymmetry of, 553, 680; embryon- 

 ic duplication in, 558; centrifuged eggs of, 

 584; genetics of sinistrality in, 680 



Mosaic development: and independent dif- 

 ferentiation, 212, ^1,2,, 336, 338, 357, 359, 

 544, 711, 713; and cleavage patterns, chap, 

 xiv; relative character of, 712; in relation 

 to dominant region, 713 



Nemerteans: reconstitution in, 47, 355, 555; 

 fragmentation in, 326; fusions of cleavage 

 stages of, 540; early cleavage of, 546 



Nereis: oxygen uptake in, 121; CO2 produc- 

 tion in, 122, 731; embryonic duplication 

 in, 558 



Nervous system : in physiological dominance, 

 8, 304, 308, 320, 330, 709; gradients and 

 localization of, 305; in coelenterate domi- 

 nance, 320; new dominant region inde- 

 pendent of, 338, 339; and planarian head 

 regeneration, 340, 407; in starfish-arm re- 

 generation, 340; in statoblast develop- 

 ment, 341; in amphibian limb regenera- 

 tion, 341; and in vitro differentiation of 

 planarian parenchyma, 714 



Obelia: reconstitution gradient in, 40, 99; 

 electric-potential gradient in, 78, 102; 

 electric current and polarity of, 421 



Oogenesis: polar gradient in echinoderm, 130; 

 in relation to intraorganismic environ- 

 ment, 658; pedunculate, 660; of starfish, 

 661; of Ascaris, 662; in chordates, 662, 

 663; in arthropods, 662, 667; follicular 

 types of, 664; with nutritive cells, 665, 

 667; and symmetry patterns, 676; and 

 protein configuration, 697 



Organizers: definitions of, 9, 455; dominant 

 regions as, 307, 344, 358, chap, xi; and 

 sca'e of organization, 343; in amphibian 

 inductions, chap, xii from p. 454; in anne- 

 lid development, 561. See also Amphibian 

 dorsal inductor; Dominance, physiologi- 

 cal; Induction; Inductor 



Oxidation-reduction, indicators of, 63, 67 



Oxygen uptake: methods of determining, 58, 

 729; gradients in flowers, 89; of Parameci- 

 um and KCN, 94, 736; gradient in 

 sponges, 96; gradient in Corymorpka, 98; 

 gradient in Tubularia and Obelia, 99; gra- 

 dient in planarians, 108, 730; gradient in 

 annelids, 121; in amphibian embryo, 153; 

 in chick embryo, 159; of Thysanozoon, 730 



Paramecium: multiple monsters of, 36; dif- 

 ferential dye reduction in, 90; indophenol 

 blue reaction in, 92; differential suscepti- 

 bility of, 92; KCN and o.xygen uptake of, 

 94, 736 



Patiria. See Starfish 



Pattern, developmental: types of, 2, 12, 597; 

 protoplasmic and organismic, 3; surface- 

 interior, 4, 606, 615, 646; axiate, 5; in re- 

 lation to ultrastructural pattern, 5, 281, 

 296, T,ii, 389, 394, 629, 631, 694; as in- 

 herent in protoplasm, 6; as a reaction to 

 external factors, 6, chaps, xi, xv, xvi, 646; 

 Roux-Weismann hypothesis of, 6; genes 

 in relation to, 6, 29, 645; gradients as 

 features of, 7, chap, ii, 104, 270, 272, 297, 

 311, 332, 396, 702, 703; of buds, 16, 17, 18, 

 285, 356, 633, 634; bipolar and multipolar, 



22, 23, 169, 309, 316, 319, 325; and fission, 



23, 26, 27, 43, 321, 323, 398, 604, 617; re- 

 constitutional differentials as evidence 

 of, chap, ii; and formative substances, 32, 



