SUBJECT INDEX 



271 



fai 1 , mammals, 1 4 

 fat-content, mealworm, j<» 



— wax-moth, 30 



feathers, growth-rates of, 100-2, 264 

 field, morphogenetic, 117, 152, 171, 



175, 176 n., 258 

 fish, proportions of, 37, 38, 259 

 forceps, of male earwigs, 71 seq. 

 form-changes, 39-41 

 function, effect of , 115, 119, 222, 224, 



227 



ganglia, 29 



— asymmetrical, in Uca, 16S 

 genetics, 4 



— and proportions of parts, 204, 207 

 gigantism, 131 



gizzard, birds, 146 

 glutathione, 169 

 gnathopod, 36, 38 

 gradient, osmotic, 260-1 

 gradients, axial, 139, 171-6, 242 



— in bio-electric potential, 174, 260 



■ — in chemical substances, 169, iy<>, 



174 



- in differentiation, 174 



in variability, 174 



— metabolic, 171 n. 



qualitative differences between, 

 176 

 -temperature, 172 

 grafting, 51, 52, 135 



178, 191-7 

 growth, absolute, 6 



— accretionary, 149 seq. 



— additive, 149 



- by cell-multiplication and cell size 



increase, 184-5 



— differential, 1 



— equilibrium of, 50, 55 



— in open and closed systems, 60 



— in various planes of space, 95-100 



— limited, 38 n., 39, 40 



— linear, 132, 137, 140 



— multiplicative, 11, 149 



— relative, in embryonic life 



— relative, limitation of, 49 



— two phases of, 118 seq. 



— unlimited, 38 n., 39, 40 

 growth-centres, 83, 85, 91-5 

 growth-coefficient, 8, 58, 81, 



— corrected, 146 

 growth-constants, 145 

 growth-gradients, 3, jgseq., 105, 159, 



160, 174-6 



— determination of, 167 seq. 



— ■ distribution in body, 104 seq. 



— form of, 90 seq. 



— general, ill seq., 152 



^l, 167, [73, 



139 seq. 

 60 



186 



growth-gradients in epidermal 

 structures, 100-2 



— major and minor, no, 112 



— positive and negative, 87 seq. 



— steepness of, 83 seq., 114, 131, 172 

 growth-intensity, 3, 139 



— local, effect of, 122, 123, 124, 125 

 — specific, 91 seq., 227 



growth-partition, 3, 49, 51, 57, 50, 



165 

 growth-potential, 80, 81, 97 



— general distribution in body, 104 



seq. 

 growth-profile, 116 

 growth-quotients, 135-41 

 growth-rate, relative, 6, 9 

 growth-ratio, lateral, in Mollusc 



shells, 159 



— length-width, in Mollusc shells, 



154 



— median, in Mollusc shells, 155 

 growth-ratios, constant, 4, 7, 8, n, 



30, 38, 51. 57. *54 seq., 165, 



234 



examples of, 13 seq. 



Haeckel's Law, 237 seq. 

 head, whales, 16, 136, 137 

 heart, birds, 224-5 



— chick, 143 



— rat, 184, 185 



— vertebrates, 17, 264 

 heterochely, 96 seq., 189 seq., igi 

 heterogony, 5, 8 



— and secondary sex characters, 



188-9 



— and sexual maturity, 8 



— in related species, 32 



— onset of, 31 



— positive and negative, 17, 87 seq., 



"3 



heterogony-mechanism, and detailed 



form-changes, 217 

 heteromorphosis, 172, 175 

 ' high ' males, 55, 70-6 

 histo-differentiation, 120, 232 

 histolysis, 173 

 hormones, and heterogony, 176 seq., 



257 



— and specificity, 177, 181, 188 



— sensitivity to, 101, 177, 181, 186, 



260 

 horns, beetles, 17, 55, 115 n., 188, 213, 

 217 



— Peridinians, 200 



— vertebrates, 150-4, 173, 188, 218- 



19 

 hypertrophy, functional, 115, 222, 

 224, 227 



