Heredity and Cytology, 95, 96 --Haeckel on, 147, 148, 149, 153 --and Variation, 87-110 --219, 224 Hering, E., on Memory, 153 Hertwig, O., 150 History, Darwin and, 246-263 Hobbes, T., 200, 215 Hobhouse, 242 HÖFFDING, H., on _The Influence of the Conception of Evolution on Modern Philosophy_, 197-222 Holothurians, calcareous bodies in skin of, 37-41 _Homo heidelbergensis_, Foot Note 118 _H. neandertalensis_, 138 _H. pampaeus_, 144 _H. primigenius_, 133, 134, 138, 144 _Homunculus_, 132 Hooker, Sir J. D., and Darwin, 23, 116 Huber, 170 Hügel, F. von, Foot Note 221 Hume, 200 Hutcheson, 216 Huxley, T. H., and Darwin, 112, 116, 268 --and the Duke of Argyll, 238 --on Lamarck, 89 --on Man, 111, 112, 137, 146, 156, 160, 163 --on Selection, 24, 91 --on transmission of acquired characters, 149 --14, 24, 104, 231-236, 273, 274 Hybrids, Sterility of, 104, 105, 106 Inheritance of acquired characters, 93, 94 Insects and Flowers, 60, 61, 78, 79 Instinct, 122, 172-175 Irish Elk, an example of coadaptation, 41, 42, 45 Jacoby, _Studies in Selection_ by, 272 James, W., 180, 191, 211 Jentsch, 275 Kallima, protective colouring of, 35, 68, 70 _K. inachis_, 68 Kammerer's experiments on Salamanders, 28 Kant, I., 4, 5, 6, 27, 198, 211, 212, 217, 221, 222 Keane, on the Primates, 138 Keith, on Anthropoid Apes, 138 Kepler, 198 Klaatsch, on Ancestry of Man, 140 Klaatsch and Hauser, 134 Knies, 266 Kölliker, his views on Evolution, 29, 150 Kollmann, on origin of human races, 144 Korschinsky, 31 Krause, E., Foot Note 10, 13 Kropotkin, 214, 275 Lamarck, his division of the Animal Kingdom, 160, 161 --Darwin's opinion of, 129 --on Evolution, 9-14, 21, 25, 171, 172, 173, 179, 180, 201, 202, 253 --on Man, 146, 148, 160, 163 --89, 109, 201, 202, 233 Lamarckian principle, 28, 41-44, 50-54, 67, 84, 86 Lamb, C., 229 Lamettrie, 198 Lamprecht, 260-263 Lanessan, J. L. de, Foot Note 17, 275 Lang, Foot Note 21 Lange, 180 Language, Darwin on, 123, 124 --Evolution and the Science of, 178, 179, 188 Lankester, Sir E. Ray, on degeneration, 268 --on educability, 170, 189 Lankester, Sir E. Ray, on the germ-plasm theory, 150 Lapouge, Vacher de, 270 Lartet, M. E., 189 Lasalle, 266 Laveleye, de, 275 Lawrence, W., 89, Foot Note 65 Lehmann-Nitsche, 138, 144 Leibnitz, 4, 5, 213 Lepidoptera, variation in, 37, 60-63 Lessing, 4, 221 Liddon, H. P., 234 _Limenitis archippus_, 74 Linnaeus, 6 Locy, W. A., Foot Note 15 Lovejoy, Foot Note 56 Lubbock, 125 Lucretius, a poet of Evolution, 4 Lyell, Sir Charles, and Darwin, 23, 116 --the uniformitarian teaching of, 89 Macacus, ear of, 119 Mach, E., 153, 211 Mahoudeau, 137 Maillet, de, 6 Majewski, Foot Note 238, Foot Note 239 Malthus, his influence on Darwin, 16-18, 21, 24, 91 --200, 273