Plants and Animals, Variation of, under Domestication, 161; Production of Abnormal Parts, 172; Separate forms on same Individual, 175; Different forms of Flowers on the same Species, 194; Climbing, 196; Power of Movements in, 197; Insectivorous, 198 Pollen, Fertilisation of Ovule, 166 “Power of Movements in Plants, The,” 197 Protective Mimicry, 203 Reproduction of an Amputated Limb or part, 170 Reproduction, Sexual and Asexual, 164, _et seq._ Reversion, 167, 175 Rolleston, Prof., 155, 156 Romanes, Prof. G. J., 185 Salisbury, Lord, Speech at the British Association Meeting at Oxford, 82, 83, 138 Scientific Discoverer, The Qualifications of a, 12 Seeds, Experiments on the Vitality of, in Salt-Water, 51, 52 Sedgwick, Prof., Darwin’s Friendship with, 18; his Excursions with, 20 Sexual and Asexual Reproduction, 164, _et seq._; Advantages of, 165; Cross-Fertilisation in Plants, 166; Characters, 174–177; Selection Theory, 67, 188, _et seq._; rejected by Wallace, 188; Darwin’s Letter to Meldola, 201 Shrewsbury, Darwin’s Birthplace, 9; and School-life at, 16; Re-visited, 25 “South America,” 190 South America, Some Observations on the Geology of, 26 Species, New, The Origin of, 56, _et seq._; “Species not Transmutable,” Dr. Bree’s Book, 149 Species-mongers, Darwin’s Dislike of, 39, 40 Speculation and Hypothesis, 14, 15 Spencer, Herbert, Term of Survival of the Fittest, 148 Spontaneous Generation, 108, 159 Sterility of Hybrids, 171 Struggle for Existence, The, 65–67, 71–77 Survival of the Fittest, The, 148 Teleology, 113, 114 Ternate, Wallace’s house at, 63 _Times_, Huxley’s Article on the Origin of Species in, 124 Transmutation of Species, 26, 149 Tristram, Canon, 92–94; Paper on Ornithology of Northern Africa, 92 Tuckwell, Rev. W., 155 Turkeys, Experimenting upon with Distasteful Caterpillars, 216 Tyndall, Prof., 157 Use and Disuse, The Inherited Effects of, 167, 179 Variability, 167, 173 Variation, of Organic Being, Darwin’s Papers upon, 65; Wallace’s Paper on, 71, _et seq._; and Selection Relative Importance of, 96; Under Domestication, 115, 161 Varieties, Departure from the Original Type, 71–77 “Volcanic Islands,” 190 Wallace, Alfred Russel, and Darwin’s Joint Paper Presented to Linnean Society, 46, 62; and Darwin, 53, 60–64, 81–86, 134; Paper Published on the Law Regulating new Species, 60; Essays on Variations from Original Type, 61, 71–77; house at Ternate, 63; Comparison of the Joint Memoir, 78–86; his Discovery of Natural Selection, 87–91; Darwin’s Letter on Bastian’s Theory of Archebiosis, 160; Darwin’s Letter to, on Pangenesis, 182 Watson, H. C., 144 Wedgwood, Josiah, 18 Weismann, Prof., on Germ-Plasm, 179; “Studies in the Theory of Descent,” Meldola’s Translation, 205–210