M Mackerel, 193 Madingly, 102 _Mænia typica_, 221 Magnus, 86 Magpie, 281 Magpie colouring, 66, 67, 280, 281 Magrath, 256 Male-fern, 49 Mallard, 65, 97, 122, 126, 132, 293, 313, 315, 334, 337 Malthus, 31 Malva, 260 Manchester School, 27 Mannikin, 104 Marbled newt, 124, 245 Marshall, 28 —— Mr G. A. K., 239 —— Milnes, 37, 174 Marsupials, 67 Masters, 86 “Materials for the Study of Variation,” 73, 103 Mauchamp sheep, 95 Mayer, 228 “Mechanischphysiologische Theorie der Abstammungslehre,” 15 _Medicago media_, 118 _Megascops asio_, 44 Melanism, 64, 101, 360 _Melopsittacus undulatus_, 101 Mendel, 42, 74, 136, 141, 142, 144, 145 Mendel’s Law, 145, 149, 150, 161 Mendelism, 145 _Mesohippus_, 41 Micellæ, 151 _Micropus melanoleucus_, 245 “Mikado, The,” 237 Mildew, 49 Mimicry, conditions of, 178 Mimicry, protective, 45, 50, 51, 173, 177-82, 226-51, 275, 293, 294 Mink, 243 _Miohippus_, 41 Missing links, 41, 42 Missouri currant, 119 Mivart, Dr St George, 7, 61 Mole, 180 _Molge blasii_, 124 _M. cristata_, 124 _M. marmorata_, 124 _M. vulgaris_, 221 Mollusca, 49 —— of Sandwich Islands, 375, 378 Molpastes, 123, 255 _Molpastes bengalensis_, 256, 379 _M. burmanicus_, 379 _M. hæmorrhous_, 255, 379 _M. intermedius_, 256, 379 _M. leucogenys_, 256 Monaul, 104 Monkey, 64, 213 Monotypic evolution, 366 Monstrosities, 56, 57, 358 Morgan, Prof. Ll., 368 —— T. H., 26 Morse, 190 Moseley, Prof., 311 _Motacilla lugubris_, 122 _M. melanope_, 122 Moth, 101, 102, 124, 209, 215, 227, 238, 240 Mouse, 64, 105, 139, 141, 146, 149, 150, 180, 185, 282, 359 Mule, 127, 136, 140, 160, 162 Müller, Fritz, 81, 180 Müllerian mimicry, 177, 181, 182 _Munia atricapilla_, 104 _M. castaneithorax_, 98 _M. flaviprymna_, 98 _M. malacca_, 104 Muscovy duck, 99, 127, 128, 281 Musk ox, 190, 192 _Mustela sarmatica_, 243 Mutations, 41, 43, 66, 69, 72, 75-105, 124, 127, 134, 159, 160, 169, 223, 280, 281, 284, 292, 295, 339, 341, 342-4, 380-8 Mutations, theory of, 26, 38, 75, 76, 95 Myna, 244 _Myristicivoræ_, 282 N Naegeli, 15, 16, 151 Nahrwal, 190 Natural selection, theory of, stated, 31, 32 “Nature,” 184 Nautili, 67 Nectar of flowers, 262, 264, 265, 268, 270, 271 Neo-Darwinians, 13, 14, 25, 173, 174, 176, 188, 214, 218, 222, 233, 238, 242, 263, 264 Neo-Darwinism, 51, 172, 234, 235, 264, 275, 276, 297 Neo-Lamarckians, 13, 14, 15 _Neophron_, 282 _Nepheronia hippia_, 179 _Nettium albigulare_, 179 New organs, beginnings of, 36, 73 Newman, 126 Newt, 124, 221, 222 Niata cattle, 95 Nicobar pigeon, 65 Nilgai, 337 Nitrogen, 153 Noddy, 62, 279 Nonpareil finch, 102 _Nyroca africana_, 337