INDEX 



NOTE. References give the number of the page on which the matter referred to begins. 



Anophthalmic form in Planar ia, 

 106, 141. 



Axis, organic: occurrence of, 8; 

 apical and basal ends of, 10; ter- 

 minology of, 19; simplest form 

 of, 35; susceptibility gradients 

 in relation to, 53, 60; independ- 

 ence of apical region of, 96, 113; 

 dominance of apical region of, 

 102; control of space relations 

 in, 128; experimental oblitera- 

 tion and determination of, 142; 

 as resultant of two pre-existent 

 axes, 164; quantitative charac- 

 ter of, 167, 185; time of deter- 

 mination of in egg and embryo, 

 199. See also Dominance; Gra- 

 dients; Individual; Polarity; 

 Symmetry. 



Begonia, adventitious buds in, 83. 



Biaxial forms: in Tubtilaria, 97, 

 133; in Planar ia, 99, 117; ex- 

 perimental transformation of, in 

 Corymorpha, 144; experimental 

 determination of, in Planaria, 

 149. See also Axis; Gradients; 

 Individual. 



Conductivity: in relation to trans- 

 mission, 40; increase in, during 

 development, 150; in relation to 

 physiological isolation, 194. See 

 also Transmission. 



Corals, individuation in, 197. 



Correlation, physiological: differ- 

 ent kinds of, 4, 27; occurrence 

 of transportative, 26, 44, 170; 

 conditions determining trans- 

 portative, 26, 170, 172. See also 

 Axis; Dominance; Gradients; 

 Individual; Transmission; 

 Transportation. 



Corymorpha: description of, 92; 

 metabolic gradients in, 132; ob- 

 literation and determination of 

 gradients in, 142. 



Crystal, compared with organic in- 

 dividual, 24. 



Cyclamen persicum, dominance 

 and subordination in leaf of, 156. 



Dedifferentiation: in agamic re- 

 production, 7, 9, 91 ; in formation 

 of adventitious individuals in 

 plants, 83; in reconstitution of 

 Planaria, 109; capacity for, in 

 lower and higher animals, 120; 

 in embryonic development, 199. 

 See also Differentiation. 



Differentiation: occurrence of, 6; 

 orderly character of, 7; different 

 degrees of, in eggs and embryos, 

 1.2 1 ; in relation to metabolic 

 gradient, 171; in relation to 

 metabolic rate, 183, 190. See 

 also Dedifferentiation. 



Dominance, physiological: origin 

 of, 36, 181; in relation to meta- 

 bolic gradients, 37, 88, 171; 

 range of, 45, 127, 133, 138, 149, 

 162, 172; in experimental re- 

 production of Tubularia, 102, 

 133; in experimental reproduc- 

 tion of Planaria, 102, 114; of 

 apical region in plants, 104, 152; 

 experimental control of, in Tu- 

 bularia, 134; experimental ob- 

 literation and determination of, 

 142; extension of, during devel- 

 opment, 149; in relation to size 

 of individual, 151, 193; in rela- 

 tion to adventitious buds in 

 plants, 154; of growing tip in 

 conifers, 154; direction of, in 

 plants, 155; in leaf of Cyclamen, 



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