230 



INDEX 



Child, C. M., 181, 202 



Chromatin, 86; of Ascaris, 78 



Chromosomes, 89, 206; as con- 

 trolling center, 79; depend- 

 ence of, 79, 91; and heredity, 

 77; use and disuse in, 208, 

 211 



Circulus, 31 



Climate, and altitude, 49; and 

 rainfall, 50; and geological 

 change, 51 



Clupeay 161 



Cockerell, T. D. A., 163 



Coincident selection, 116 



Colonies, 32 



Conger, G. P., 1 



Conklin, E. G., 5, 56, 62, 79, 80, 

 82, 85, 97 



Constancy of organism, 92 



Continuity, of germ plasm, 92, 

 104, 209; of somatic tissues, 

 210 



Controversy, 201 



Cook, O. F., 34 



Cope, E. D., 138 



Corpuscles, red, 80, 99 



Cowdry, E. V., 84 



Coyote, 151 



Cretinism, 37 



Crossopterygii, 134, 166, 180, 217 



Cuenot, L., 125, 130, 133, 214 



Cunningham, J. T., 62, 91, 97, 

 141, 149 



Cytolysins, 155 



Cytoplasm, 87, 206; compared 

 with soma, 87; constancy of, 

 89; dependence of, 84; differ- 

 entiation in eggs, 85; in hered- 

 ity, 77, 84; necessity of, 82; 

 and nucleus, 78 



Daphnia, QQ, 155 



Darwin, Charles, 23, 53, 70, 113, 

 114, 124, 136, 137, 139, 199 



Darwinian school, 113 



Darwinism, compared with La- 

 marckism, 138 



Deer-mice, 153 



De Mol, W. E., 74 



Dendy, A., 35 



Depression and climate, 51 



Devaux, E., 120, 175 



Development, degrees of, 73; of 

 muscles, 207 



DeVries, H., 81, 127, 128, 132 



Dispersal, 68, 121, 160; and ad- 

 aptation, 50 



Dixey, F. A., 95 



Drosophila, 58, 73, 74, 92, 94, 

 101, 128, 144, 148 



Duration of experiments, 221 



Edelweiss, 36 



Elan vital, 9 



Elephants, 165 



Elevation and climate, 51 



Embryology, 85 



Emergents, 169 



Endocrine glands, 90, 216 



Enucleation, 99 



Environment, 5, 35, 87, 178, 181, 

 201, 203; effect of change, 72; 

 complexity of, 17; control by 

 man, 191; in evolution, 147, 

 151, 193; external, 58; inter- 

 nal, 21, 57, 215, 225; and mu- 

 tation, 94, 98; organic, 20; 

 phases of, 18; physical, 18; of 

 species, 41; source of life, 14 



Enzymes, 81, 97 



Epigenesis, 202 



