192 



MEXDELISM 



Johannsen, W., 160 



Lop-eared rabbits, 132 



Mendel, 8, 17, 26, 132 

 Mental characters, 180 

 Mice, inheritance of coat colour in. 



. 5 °. 

 Mimicry, 143 



Mirabilis, 151 



Morgan, T. H., 116 

 Mulattos, 129 



Mutation, 83, 138 



Nageli, C, 26 



Natural selection, n, 140, 142, 149 

 Xettleship, E., 175 

 Xight-blindness, 17? 



Pararge egeria, 132 



Parkinson, J., 122 



Pea comb, 33 



Peas, coloured flowers in, 24 



Peas, tall and dwarf, 18 



Pigeons, 86 



Pin-eye in primulas, 55 



Pisum, 17 



Primulas, 31, 55, 68, 93 



Pollen, 3 



Pollen of sweet peas, 92 



Pomace fly, 115 



Population, inheritance of characters 



in a, 147 

 Presence and Absence theory, 35 

 Pure lines, 162 

 Purity of gametes, 24 

 Purity of type, 155 



Rabbits, 53, 60 

 Ratios, Mendelian — 



3 : 1, 20 



9:3:3:1, 25, 34 



9:3:4, 5i 



9 : 7, 49 

 Ray, John, 143 

 Recessive characters, 19 

 Repulsion between factors, 90 



Reversion, 59, 165 

 in rabbits, 59 

 in sweet peas, 62 

 in fowls, 65 



in pigeons, 65 

 Rose comb, 33 



Saunders, E. R., 54, 122 



Seeds, nature of, 4 



Segregation, 22 



Selection, 162 



Sheep, horns in, 76 



Silky fowls, 30, 105 



Single comb, 32 



Species, nature of, 150 



Species, origin of, 1 1 



Speckled wood butterfly, 132 



Spermatozoa, 3 



Sports, 147 



Staples-Browne, R., 66 



Sterility, 151 



Sterility in sweet peas, 93 



Stocks, double, 122 



Stocks, hoariness in, 54 



Sweet pea, colour in, 44, 79 

 history of, 82 

 inheritance of hood in, 89 

 inheritance of size in, 62 



Telegony, 167 

 Thrum-eye in primulas, 55 

 Toe, extra toe in poultry, 3 6 

 Tschermak, E., 29 



Unit-character, definition of, 31 



Variation, 14, 137, 139 



Walnut comb, 33 

 Weismann, A., 13 

 Wheat, beard in, 74 



experiments with, 157 

 White, dominant in poultry, 72 

 Wilson, J., 16S 



Yellow mice, 119 



Zygotes, nature of, 5 



