Ackermann, A., 108
Aleurone color, 23
Allen, C. E., 32
Allolobophora terrestris, 111
Anderson, E., 81
Anemone, 37
Angiosperms, 32, 59, 138; sterility in, 79
Annelid, 71, 99
Antirrhinum, 88, 108
Assortative mating, 119; in Paramecium, 121

Babcock, E. B., 109
Balls, W. L., 57, 59
Barley, 16, 23, 34
Basidiomycetes, 93
Bateson, W., 24, 138
Baur, E., 88, 108, 114
Beeton, M., 130
Blakeslee, A. F., 15, 16, 73, 117, 139
Blepharisma, 122
Born, G., 111,
Brassica, 83, 108, pods of, 116,
Brink, R. A., 10, 20, 27, 31, 73
Brunswik, H., 93
Bryophytes, 98
Buchholz, J. T., 15, 16, 73
Burnham, C. R., 20, 27, 73
Bursa, 88

Cabbage, 82, 84
Campanula, 112
Campion, 10
Candytuft, 37
Castle, W. E., 3, 81, 100
Cavia species, 107
Certation, 4
Cherry tree, 80
Chimeras, 110
Chromodoris, 122, 123
Chromosome: new type produced by cross, 113; species differing in, 112
Chrysanthemum, 112
Ciehorium, 83
Ciliate, 122
Ciona, 81
Citrullus, 135
Citrus, 110
Clausen, R. E., 104, 105, 106, 113
Clements, F. E., 96
Coelenterates, 97, 110
Collins, G. N., 10, 30, 74, 101
Collins, J. L., 109
Conklin, E. G., 100
Correns, C., 6, 7, 11 ff.
Cotton, 66; flower, 67; mixed pollination with, 57; stigmas of, 69
Coulter, M. C., 23, 31
Crampton, H. E., 131
Crane, M. B., 79, 80
Crataegus, chromosomes of, 112
Crepis, 112; hybrid, 109
Crozier, XV. J., 122 ff.
Crucifer, 37
Crustacean, 123
Cucurbit, 136
Cuénot, L., 3

Darwin, C., 36 ff., 75, 79, 126, 131, 132, 135
Datura: deviating segregations in, 23, 34; rate of pollen-tube growth of, 15, 16; tetraploid mutation, 117, 139
Deer, 227
De Morgan, W., 99
Detlefsen, J. A, 107
De Vries, II., 4, 6, 17, 18
Dichogamy, 137
Dickerogammarus, 124
Dingo, 227
Dioecism, 137
Dog, 127
Drosophila: assortative mating in, 125; eggs, 47; reduced ferrility in outcrossing, 239; sterility between species of, 115, 216
Dunn, L. C., 100
Durham, F. M., 113

Earthworm, 111
East, E. M., 6, 7, 78, 81, 86 ff., 102, 103, 106, 110
Echinoderms, 97
Egg lethals, 18
Emerson, R. A., 24, 25
Equus, 108
Erdmann, R., 76
Euchlaena mexicana, 101
Evolution, 131

Fertilization: selective, 4; specificity in, 99
Focke, W. O., 108
Fox, 127
Fragaria, 212
Frog, 111
Fuchs, H. M., 99
Fundulus heteroclitus, 110

Gaines, E. F., 108
Gametophytic selection, 4
Gammarids, 123
Gammarus, 124
Gamolysis, 4, 17, 28
Gärtner, C. F., 2, 108, 135, 136
Geese, 128
Godlewski, E., 71
Goodspeed, T. H., 104, 105, 106, 113
Goss, 2
Gowen, J. W., 79
Gramineae, 59
Gravatt, F., 108, 109, 214
Green, F., 110
Guinea pig, 107; hybrid, 108
Gulick, J. T., 131, 132, 233
Gymnosperms, 32, g8

Hall, H. M., 96
Hallqvist, C., 16, 23
Harrison, G. J., 68, 71
Harrison, R. G., 58, 111
Hayes, H. K., 6, 7, 110
Hercogamy, 94
Heribert-Nilsson, N., 4, 13, 57, 66
Herlant, M., 71
Heterosis, 4, 74, 76
Heterostyly, 94, 137
Heterozygosis, stimulation of, 76
Hieracium, 112
Hippodamia, 125
Homogamy, 130, 135, 238
Hordeum, 16, 93
Horse, 127
Hutchison, C. B., 21
Hyacinth, 37
Hybrid vigor, 39, 75, 76, 137

Iberis umbellata, 37
Ichijima, K., 112
Isolation, geographical, 133; physiological, 132, 133

Jennings, H. S., 77, 121
Jesenko, F., 108
Joest, E., 111
Jones, D. F., 7, 20, 25, 27, 39, 47, 136
Jordan, A., 134

Karpechenko, G. D., 108, 113, 114, 116, 139
Kellogg. V. L., 125
Kempton, J. H., 50, 30, 31, 74, 101
Kiesselbach, T. A., 50, 30, 43, 74
Knight, 2
Költeuter, J. O., 36, 78, 108
Kupelwieser, H., 99

Lee, A., 129
Lehman, E., 81, 88, 92
Leptinotarsa, 225, 126
Lethal factors, 19, 22, 201
Letbais, egg, 28
Lilium, 66
Linaria, 88
Liverworts, 32
Lock, R. H., 6
Loeb, J., 99, 100, 120
Longevity, 130
Longley, A. E., 112
Love, H. H., 108
Lumbricus rubellus, i 1
Lychnis dioica, 10
Lycopersicum esculentum, 55, 110

McCleland, T. B., 66
MacGillivray, J. II., 10
Maize, 8, 10, 20, 22 ff., 32, 34, 40, 42, 45, 46, 54, 59, 74, 93, 136; amount of selective action, 62; pistillate inflorescence, 60; pollen mixtures, 48
Malvaceae, 59
Man, 128, 138
Mangelsdorf, A. J., 81, 89 ff.
Mangelsdorf, P. C., 20 ff.
Marriage, 128
Melandrium: deviating segregations, 23, 34; growth of pollen-tubes, 13; more pistillate than staminate plants, 10, 11; pollen-tube factors, 93; preferential fertilization, 16
Mendel, 2, 6, 18, 108, 132
Mendelian: factors, 33; heredity, 81; principles of heredity, 1; ratios, 3; units, 140
Mendelism, 2
Metazoa, 120
Meunisser, 24
Mice, 2, 111
Miller, E. C., 65
Mimulus luteus, 37
Moenkhaus, W. J., 110
Mollusk, 72, 98, 99; distribution, 132
Monkey-flower, 37
Morgan, C. L., 132, 134
Morgan, T. H., 81, 111
Mosses, 32

Nägeli, C., 134
Nathusius, von, S., 108
Naudin, C., 235
Nicotiana, 81, 83, 85, 86, 93, 104; hybrid, 110; sell-sterility in, 95; species, 213; sterile hybrid, 202

Oenothera: cross of short- and long-styled, 15; difference shown by ovules, 27, 18, 33; excess of red-veined plants, 23; pollen tubes reach ovary in shorter time, 66; preferential fertilization in, 16, 57; segregation in, 23
Onagraceae, 59
Orange, 37

Paramecium, 77, 120, 121
Park, J. B., 78, 81, 86, 87
Parnell, F. R., 20
Pearl, R., 120, 121, 125, 130
Pearson, K., 129, 130
Peas, 20, 23, 34
Pellew, C., 24, 113
Petersen, N, F., 10, 30
Pigeon, 127, 128
Pisum, 6, 23
Plough, H. H., 116, 139
Pollen: age of, 13, 14; mixtures, 35; viability, 43
Pollen-tube: factors, 20, 25, 65; growth, differential, 4; stimulation, selective, 4
Potato, 110
Primrose, evening, 17
Primula, 113
Protozoa, 120, 138
Prunus, 110
Przibram, 108
Pteridophytes, 98
Pyrus, 110

Rabbit, 128
Radish, 108; and cabbage hybrid, 109
Rana palustris, 111; virescens, 111
Ranunculus, 37
Raphanus, pods of, 116
Raphanus-Brassica hybrid, 113, 139
Raphanus sativus, 37, 108
Recombination, dependent, 6
Renner, O., 14
Reseda odorata, 79
Rhododendron, 37
Rhubarb, 37
Rice, 20, 34
Rörig, A, 108
Romanes, G. J., 131 ff.
Rook, 127
Rosa, 112
Rotifer, 100
Rubus, chromosomes of, 112
Rumex acetosa, 12

Sagaret, A, 108, 114
Sax, K., 111
Schoene, 111
Scott, 135
Sea urchin, 72, 99
Segregation, dependent, 6
Selection, sexual, 133
Self-sterile cabbage, 82, 84
Self-sterility, 37, 137
Seton, 2
Sex, importance of, 137
Sexual selection, 133
Shearer, C., 99
Sheep, 127
Shrill, A. F., 100
Shrill, G. H., 76, 88
Silk moths, 100
Sirks, M. J., 25, 20, 23
Snyder, L. H., 123 ff.
Solanaceae, 59
Solanum tuberosum, 110
Sorrel, 12
Sperm: antagonism of, 71; mixture of, 71
Spermatophytes, 4, 32
Spillman, W. J., 2
Sterility: impotence, 78; in fruits, 78; incompatibility, 78; International Conference on, 78, 93; interspecific, 36
Stevenson, F. J., 108
Stout, A. B., 78, 82 ff.
Strawberry, 37
Sturtevant, A. H., 115, 125
Sutton, I., 79

Tetraploid plants, 116
Thallophytes, 98
Tobacco hybrid, 102, 108
Tokugawa, V., 66
Tomato, 5, 6, 100
Tomato-nightshade chimera, 110
Tower, W. L., 125
Triploid plants, 116
Tripsacum dactyloides, 101
Triticum species, chromosome number of, 111
Tschermak, 6
Tulip, 37

Vanilla, 6
Verbascum, 78, 535
Veronica, 88, 93
Vertebrates, 98
Vicinism, 37
Vilmorin, 24
Viola, 112; species, 113; species crosses, 112

Wallace, 131
Weatherwax, P., 10
Wellensiek, S. J., 23, 24, 31
Wentz, J. B., 29
Wettstein, F., 32
Wheat, 111
Wheat-rye hybrid, 108
White, 24
Winkler, H., 110
Woodruff, L. L., 76

Xenia, 4, 46

Zea, 16, 93; mays, 39; mays everta, 61