330 
Correlation, 102 e¢ seq. 
coefficient, 106 e¢ seq. 
Correns, 19, 190, 299 
Coupling, 197 e¢ seq. 
Cowslip, 8 
Criminals, 295 
Crustaceans, 62 
Cryptomerism, 203 
Cuénot, 206 et seq., 274 
Cytology, 239 et seq., 303 
Dalton, 19, 175 
Darwin, Charles, 2, 3, 16, 33, 
38, 40 et seqg., 54, 131, 
160, 215, 310, 320 
Erasmus, 29 
Sir G., 28 
Daughter-cell, 242 
Davenport, 99 
De Maillet, 30 
Degressive mutation, 153 
Determinants, 279 
Deviation, 98, 125 
de Vries, 17, 19, 75, 76, 83, 
I2I, 135 ef seg., 153, I90, 
216, 218, 267, 311 
Di-hybrids, 186 
Discontinuous variation, 128 
et seq., 309 et seq. 
Domestication, 34 
Dominance, 192 
Dominant, 179 
Double flowers, 133 
Druery, C. T., 36 
Dyer, Sir W. Thistelton, 35 
Elephant, 46 
Embryo, 177 
Embryology, 31, 243 
Emily Henderson, 209 
Empedocles, 29 
Endosperm, 177 
INDEX 
Error, probable, 99 
Eugenics, 20, 282 e¢ seq. 
Evening primrose, 83 
Evolution, 22 et seq. 
parallel, 57, 59 
Eye, colour of human, 83, IIo 
Ferns, 305 
Fertilization, 162, 244, 246 
normal, 216 
Flat fishes, 38 
Fluctuating variations, 75 
Formula Mendelian, 183 
Franklin, 45 
Fraternal correlation, 106 e? 
seq. 
Frequency, 98 
Gaertner, 170 
Galton, 80, 89, 107, 113, 125 
et seq., 282 et seq. 
Gametes, 178, 244 
Geikie, 28 
Genetics, 298 
Genetic variations, 317 
Geographical distribution, 33 
Geological succession, 33 
time, 27, 313 
Germ-cells, 73, 178, 244 
Germ-plasm theory, 276 et seq. 
Giraffe, 37 
Goethe, 30, 75 
Goss, 169 
Gradation of organisms, 31 
Greenland whale, 52 
Gregory, R. P., 215 
Greyhound, coat colour of, 
IIo 
Gulick, 50 
Habit of plants, 314 
Half-race, 148 et seq. 
