Ipomoea purpurea--seeds per capsule on crossed and self-fertilised plants from the same parents as in the last case, but growing much crowded, spontaneously self-fertilised under a net, in number: 93. Ipomoea purpurea--productiveness of the same plants, as judged by the number of capsules produced, and average number of seeds per capsule: 45. Ipomoea purpurea--third generation: seeds per capsule on crossed and self-fertilised plants, spontaneously self-fertilised under a net, in number: 94. Ipomoea purpurea--productiveness of the same plants, as judged by the number of capsules produced, and the average number of seeds per capsule: 35. Ipomoea purpurea--fifth generation: seeds per capsule on crossed and self-fertilised plants, left uncovered in the hothouse, and spontaneously fertilised: 89. Ipomoea purpurea--ninth generation: number of capsules on crossed plants to those on self-fertilised plants, spontaneously self-fertilised under a net: 26. Mimulus luteus--an equal number of capsules on plants descended from self-fertilised plants of the 8th generation crossed by a fresh stock, and on plants of the 9th self-fertilised generation, both sets having been left uncovered and spontaneously fertilised, contained seeds, by weight: 30. Mimulus luteus--productiveness of the same plants, as judged by the number of capsules produced, and the average weight of seeds per capsule: 3. Vandellia nummularifolia--seeds per capsule from cleistogene flowers on the crossed and self-fertilised plants, in number: 106. Salvia coccinea--crossed plants, compared with self-fertilised plants, produced flowers, in number: 57. Iberis umbellata--plants left uncovered in greenhouse; intercrossed plants of the 3rd generation, compared with self-fertilised plants of the 3rd generation, yielded seeds, in number: 75. Iberis umbellata--plants from a cross between two varieties, compared with self-fertilised plants of the 3rd generation, yielded seeds, by weight : 75. Papaver vagum--crossed and self-fertilised plants, left uncovered, produced capsules, in number: 99. Eschscholtzia californica--Brazilian stock; plants left uncovered and cross-fertilised by bees; capsules on intercrossed plants of the 2nd generation, compared with capsules on self-fertilised plants of 2nd generation, contained seeds, in number: 78. Eschscholtzia californica--productiveness of the same plants, as judged by the number of capsules produced, and the average number of seeds per capsule: 89. Eschscholtzia californica--plants left uncovered and cross-fertilised by bees; capsules on plants derived from intercrossed plants of the 2nd generation of the Brazilian stock crossed by English stock, compared with capsules on self-fertilised plants of 2nd generation, contained seeds, in number: 63. Eschscholtzia californica--productiveness of the same plants, as judged by the number of capsules produced, and the average number of seeds per capsule: 40.