Chapter 42

crossing of the domestic cat with _Felis Caffra_, i. 44; feral pigeons in Ascension, i. 190; domestic pigeons of Ceylon, i. 206; on _Gallus Stanleyi_, i. 234; on black-skinned Ceylonese fowls, i. 256. LE COMPTE family, blindness inherited in, ii. 78. LECOQ, bud-variation in _Mirabilis jalapa_, i. 382; hybrids of _Mirabilis_, i. 393, ii. 169, 265; crossing in plants, ii. 127; fecundation of _Passiflora_, ii. 137; hybrid _Gladiolus_, ii. 139; sterility of _Ranunculus ficaria_, ii. 170; villosity in plants, ii. 277; double asters, ii. 316. LE COUTEUR, J., varieties of wheat, i. 313-315; acclimatisation of exotic wheat in Europe, i. 315; adaptation of wheat to soil and climate, i. 316; selection of seed-corn, i. 318; on change of soil, ii. 147; selection of wheat, ii. 200; natural selection in wheat, ii. 233; cattle of Jersey, ii. 234. LEDGER, Mr., on the Llama and Alpaca, ii. 208. LEE, Mr., his early culture of the pansy, i. 368. _Leersia oryzoides_, ii. 91. LEFOUR, period of gestation in cattle, i. 87. LEGS, of fowls, effects of disuse on, i. 270-272; characters and variations of, in ducks, i. 284-288; fusion of, ii. 341. LEGUAT, cattle of the Cape of Good Hope, i. 88. LEHMANN, occurrence of wild double-flowered plants near a hot spring, ii. 168. LEIGHTON, W. A., propagation of a weeping yew by seed, ii. 19. LEITNER, effects of the removal of anthers, ii. 167. LEMMING, ii. 152. LEMOINE, variegated _Symphytum_ and _Phlox_, i. 384. LEMON, i. 334, 335; orange fecundated by pollen of the, i. 399. LEMURS, hybrid, ii. 153. LEPORIDES, ii. 98-99, 152. LEPSIUS, figures of ancient Egyptian dogs, i. 17; domestication of pigeons in ancient Egypt, i. 204. _Leptotes_, ii. 134. _Lepus glacialis_, i. 111. _Lepus magellanicus_, i. 112. _Lepus nigripes_, i. 108. _Lepus tibetanus_, i. 111. _Lepus variabilis_, i. 111. LEREBOULLET, double monsters of fishes, ii. 340. LESLIE, on Scotch wild cattle, i. 85. LESSON, on _Lepus magellanicus_, i. 112. LEUCKART on the larva of Cecidomyidæ, ii. 360. LEWIS, G., cattle of the West Indies, ii. 229. LHERBETTE and Quatrefages, on the horses of Circassia, ii. 102, 225. LIEBIG, differences in human blood, according to complexion, ii. 276. LIEBREICH, occurrence of pigmentary retinitis in deaf-mutes, ii. 328. LICHENS, sterility in, ii. 171. LICHTENSTEIN, resemblance of Bosjesman's dogs to _Canis mesomelas_, i. 25; Newfoundland dog at the Cape of Good Hope, i. 36. LILACS, ii. 164. LILIACEÆ, contabescence in, ii. 165. _Lilium candidum_, ii. 137. LIMBS, regeneration of, ii. 376-377. LIMBS and head, correlated variation of, ii. 323. LIME, effect of, upon shells of the mollusca, ii. 280. LIME tree, changes of by age, i. 364, 387. LIMITATION, sexual, ii. 71-75. LIMITATION, supposed, of variation, ii. 416. _Linaria_, pelorism in, ii. 58, 61, 346; peloric, crossed with the normal form, ii. 70; sterility of, ii. 166. _Linaria vulgaris_ and _purpurea_, hybrids of, ii. 94. LINDLEY, John, classification of varieties of cabbages, i. 324; origin of the peach, i. 338; influence of soil on peaches and nectarines, i. 340; varieties of the peach and nectarine, i. 343; on the New Town pippin, i. 349; freedom of the Winter Majetin apple from coccus, i. 349; production of monoecious Hautbois strawberries by bud-selection, i. 353; origin of the large tawny nectarine, i. 375; bud-variation in the gooseberry, i. 376; hereditary disease in plants, ii. 11; on double flowers, ii. 167; seeding of ordinarily seedless fruits, ii. 168; sterility of _Acorus calamus_, ii. 170; resistance of individual plants to cold, ii. 309. LINNÆUS, summer and winter wheat regarded as distinct species by, i. 315; on the single-leaved strawberry, i. 353; sterility of Alpine plants in gardens, ii. 163; recognition of individual reindeer by the Laplanders, ii. 251; growth of tobacco in Sweden, ii. 307. LINNET, ii. 158. _Linota cannabina_, ii. 158. {462} LINUM, ii. 165. LION, fertility of, in captivity, ii. 150, 151. LIPARI, feral rabbits of, i. 113. LIVINGSTONE, Dr., striped young pigs on the Zambesi, i. 77; domestic rabbits at Loanda, i. 112; use of grass-seeds as food in Africa, i. 308; planting of fruit-trees by the Batokas, i. 309; character of half-castes, ii. 46; taming of animals among the Barotse, ii. 160; selection practised in South Africa, ii. 207, 209. LIVINGSTONE, Mr., disuse a cause of drooping ears, ii. 301. LIZARDS, reproduction of tail in, ii. 294; with a double tail, ii. 341. LLAMA, selection of, ii. 208. LLOYD, Mr., taming of the wolf, i. 26; English dogs in northern Europe, i. 36; fertility of the goose increased by domestication, i. 288; number of eggs laid by the wild goose, ii. 112; breeding of the capercailzie in captivity, ii. 156. LOANDA, domestic rabbits at, i. 112. _Loasa_, hybrid of two species of, ii. 98. _Lobelia_, reversion in hybrids of, ii. 392; contabescence in, ii. 166. _Lobelia fulgens_, _cardinalis_, and _syphilitica_, ii. 136. LOCKHART, Dr., on Chinese pigeons, i. 206. LOCUST-TREE, ii. 274. LOISELEUR-DESLONGCHAMPS, originals of cultivated plants, i. 307; Mongolian varieties of wheat, i. 313; characters of the ear in wheat, i. 314; acclimatisation of exotic wheat in Europe, i. 315; effect of change of climate on wheat, i. 316; on the supposed necessity of the coincident variation of weeds and cultivated plants, i. 317; advantage of change of soil to plants, ii. 146. _Lolium temulentum_, variable presence of barbs in, i. 314. LONG-TAILED sheep, i. 94, 95. LOOCHOO islands, horses of, i. 53. LORD, J. K., on Canis latrans, i. 22. "LORI RAJAH," how produced, ii. 280. _Lorius garrulus_, ii. 280. "LOTAN," tumbler pigeon, i. 150. LOUDON, J. W., varieties of the carrot, i. 326; short duration of varieties of peas, i. 329; on the glands of peach-leaves, i. 343; presence of bloom on Russian apples, i. 349; origin of varieties of the apple, i. 350; varieties of the gooseberry, i. 354; on the nut tree, i. 357; varieties of the ash, i. 360; fastigate juniper (_J. suecica_), i. 361; on _Ilex aquifolium ferox_, i. 362; varieties of the Scotch fir, i. 363; varieties of the hawthorn, _ibid._; variation in the persistency of leaves on the elm and Turkish oak, i. 363; importance of cultivated varieties, _ibid._; varieties of _Rosa spinosissima_, i. 367; variation of dahlias from the same seed, i. 370; production of Provence roses from seeds of the moss rose, i. 380; effect of grafting the purple-leaved upon the common hazel, i. 395; nearly evergreen Cornish variety of the elm, ii. 310. LOW, G., on the pigs of the Orkney islands, i. 70. LOW, Prof., pedigrees of greyhounds, ii. 3; origin of the dog, i. 10; burrowing instinct of a half-bred Dingo, i. 28; inheritance of qualities in horses, i. 51; comparative powers of English race-horses, Arabs, &c., i. 54; British breeds of cattle, i. 80; wild cattle of Chartley, i. 84; effect of abundance of food on the size of cattle, i. 91; effects of climate on the skin of cattle, i. 92, ii. 326; on interbreeding, ii. 116; selection in Hereford cattle, ii. 214; formation of new breeds, ii. 244; on "sheeted" cattle, ii. 349. LOWE, Mr., on hive bees, i. 299. LOWE, REV. Mr., on the range of _Pyrus malus_ and _P. acerba_, i. 348. "LOWTAN" tumbler pigeon, i. 150. _Loxia pyrrhula_, ii. 154. LUBBOCK, Sir J., developments of the Ephemeridæ, ii. 366. LUCAS, P., effects of cross-breeding on the female, i. 404; hereditary diseases, ii. 7, 78-79; hereditary affections of the eye, ii. 9-10; inheritance of anomalies in the human eye and in that of the horse, ii. 10, 11; inheritance of polydactylism, ii. 13; morbid uniformity in the same family, ii. 17; inheritance of mutilations, ii. 23; persistency of cross-reversion, ii. 35; persistency of character in breeds of animals in wild countries, ii. 64; prepotency of transmission, ii. 65, 68; supposed rules of transmission in crossing animals, ii. 68; sexual limitations of transmission of peculiarities, ii. 72-73; absorption of the minority in crossed races, ii. 88; crosses without blending of certain characters, ii. 92; on interbreeding, ii. 116; variability dependent on reproduction, ii. 250; period of action of variability, ii. 260; inheritance of deafness in cats, ii. 329; complexion and constitution, ii. 335. LUCAZE-DUTHIERS, structure and growth of galls, ii. 282-284. LUIZET, grafting of a peach-almond on a peach, i. 338. {463} LÜTKE, cats of the Caroline Archipelago, i. 47. LUXURIANCE, of vegetative organs, a cause of sterility in plants, ii. 168-171. LYONNET, on the scission of _Nais_, ii. 358. _Lysimachia nummularia_, sterility of, ii. 170. _Lythrum_, trimorphic species of, ii. 400. _Lythrum salicaria_, ii. 183; contabescence in, ii. 166. _Lytta vesicatoria_, affecting the kidneys, ii. 380.

_Macacus_, species of, bred in captivity, ii. 153. MACAULAY, Lord, improvement of the English horse, ii. 213. MCCLELLAND, Dr., variability of fresh-water fishes in India, ii. 259. MCCOY, Prof., on the dingo, i. 26. MACFAYDEN, influence of soil in producing sweet or bitter oranges from the same seed, i. 335. MACGILLIVRAY, domestication of the rock-dove, i. 185; feral pigeons in Scotland, i. 190; number of vertebræ in birds, i. 266; on wild geese, i. 287; number of eggs of wild and tame ducks, ii. 112. MACKENZIE, Sir G., peculiar variety of the potato, i. 330. MACKENZIE, P., bud-variation in the currant, i. 376. MACKINNON, Mr., horses of the Falkland islands, i. 52; feral cattle of the Falkland islands, i. 86. MACKNIGHT, C., on interbreeding cattle, ii. 118. MACNAB, Mr., on seedling weeping birches, ii. 18; non-production of the weeping beech by seed, ii. 19. MADAGASCAR, cats of, i. 47. MADDEN, H., on interbreeding cattle, ii. 118. MADEIRA, rock pigeon of, i. 184. _Magnolia grandiflora_, ii. 308. MAIZE, its unity of origin, i. 320; antiquity of, _ibid._; with husked grains said to grow wild, _ibid._; variation of, i. 321; irregularities in the flowers of, i. 321; persistence of varieties, _ibid._; adaptation of to climate, i. 322, ii. 307; acclimatisation of, ii. 313, 347; crossing of, i. 400, ii. 104-105; extinct Peruvian varieties of, ii. 425. MALAY fowl, i. 227. MALAY Archipelago, horses of, i. 53; short-tailed cats of, i. 47; striped young wild pigs of, i. 76; ducks of, i. 280. MALE, influence of, on the fecundated female, i. 397-406; supposed influence of, on offspring, ii. 68. MALE flowers, appearance of, among female flowers in maize, i. 321. MALFORMATIONS, hereditary, ii. 79. _Malva_, fertilisation of, i. 402, ii. 363. _Mamestra suasa_, ii. 157. MAMMÆ, variable in number in the pig, i. 74; rudimentary, occasional full development of, in cows, i. 87, ii. 317; four present in some sheep, i. 95; variable in number in rabbits, i. 106; latent functions of, in male animals, ii. 52, 317; supernumerary and inguinal, in women, ii. 57. MANGLES, Mr., annual varieties of the heartsease, ii. 305. MANTELL, Mr., taming of birds by the New Zealanders, ii. 161. MANU, domestic fowl noticed in the Institutes of, i. 246. MANURE, effect of, on the fertility of plants, ii. 163. MANX cats, i. 46, ii. 66. MARCEL de Serres, fertility of the ostrich, ii. 156. MARIANNE islands, varieties of _Pandanus_ in, ii. 256. MARKHAM, Gervase, on rabbits, i. 104, ii. 204. MARKHOR, probably one of the parents of the goat, i. 101. MARQUAND, cattle of the channel islands, i. 80. MARRIMPOEY, inheritance in the horse, ii. 10. MARROW, vegetable, i. 357. MARRYATT, Capt., breeding of asses in Kentucky, ii. 237. MARSDEN, notice of _Gallus giganteus_, i. 235. MARSHALL, Mr., voluntary selection of pasture by sheep, i. 96; adaptation of wheats to soil and climate, i. 316; "Dutch-buttocked" cattle, ii. 8; segregation of herds of sheep, ii. 103; advantage of change of soil to wheat and potatoes, ii. 146; fashionable change in the horns of cattle, ii. 210; sheep in Yorkshire, ii. 235. MARSHALL, Prof., growth of the brain in microcephalous idiots, ii. 389. MARTENS, E. Von, on _Achatinella_, ii. 53. MARTIN, W. C. L., origin of the dog, i. 16; Egyptian dogs, i. 18; barking of a Mackenzie River dog, i. 27; African hounds in the Tower menagerie, i. 32; on dun horses and dappled asses, i. 55; breeds of the horse, i. 49; wild horses, i. 51; Syrian breeds of asses, i. 62; asses without stripes, i. 63; effects of cross-breeding on the female in dogs, i. 404; striped legs of mules, ii. 42. MARTINS, defective instincts of silkworms, i. 304. MARTINS, C., fruit trees of Stockholm, ii. 307. {464} MASON, W., bud-variation in the ash, i. 382. MASTERS, Dr., reversion in the spiral-leaved weeping willow, i. 383; on peloric flowers, ii. 58; pelorism in a clover, ii. 346; position as a cause of pelorism, ii. 345, 347. MASTERS, Mr., persistence of varieties of peas, i. 329; reproduction of colour in hyacinths, ii. 20; on hollyhocks, ii. 107; selection of peas for seed, ii. 199-200; on _Opuntia leucotricha_, ii. 286; reversion by the terminal pea in the pod, ii. 347. MASTIFF, sculptured on an Assyrian monument, i. 17, ii. 429; Tibetan, i. 35-36, ii. 278. MATTHEWS, Patrick, on forest trees, ii. 237. _Matthiola annua_, i. 399, ii. 20. _Matthiola incana_, i. 381, 399. MAUCHAMP, merino sheep, i. 100. MAUDUYT, crossing of wolves and dogs in the Pyrenees, i. 24. MAUND, Mr. crossed varieties of wheat, ii. 130. MAUPERTUIS, axiom of "least action," i. 12. MAURITIUS, importation of goats into, i. 101. MAW, G., correlation of contracted leaves and flowers in pelargoniums, ii. 330, 331. MAWZ, fertility of _Brassica rapa_, ii. 165. _Maxillaria_, self-fertilised capsules of, ii. 134; number of seeds in, ii. 379. _Maxillaria atro-rubens_, fertilisation of, by _M. squalens_, ii. 133. MAYES, M., self-impotence in _Amaryllis_, ii. 139. MECKEL, on the number of digits, ii. 13; correlation of abnormal muscles in the leg and arm, ii. 322. MEDUSÆ, development of, ii. 368, 384. MEEHAN, Mr., comparison of European and American trees, ii. 281. _Meleagris mexicana_, i. 292. _Meles taxus_, ii. 151. MELONS, i. 359-360; mongrel, supposed to be produced from a twin-seed, i. 391; crossing of varieties of, i. 399, ii. 108, 129; inferiority of, in Roman times, ii. 216; changes in, by culture and climate, ii. 275; serpent, correlation of variations in, ii. 330; analogous variations in, ii. 349. MEMBRANES, false, ii. 294-295. MÉNÉTRIES, on the stomach of _Strix grallaria_, ii. 302. MENINGITIS, tubercular, inherited, ii. 78. METAGENESIS, ii. 366. METAMORPHOSIS, ii. 366. METAMORPHOSIS and development, ii. 388, 389. METZGER, on the supposed species of wheat, i. 312-313; tendency of wheat to vary, i. 315; variation of maize, i. 321-322; cultivation of American maize in Europe, i. 322, ii. 347; on cabbages, i. 323-325; acclimatisation of Spanish wheat in Germany, ii. 26; advantage of change of soil to plants, ii. 146; on rye, ii. 254; cultivation of different kinds of wheat, ii. 261. MEXICO, dog from, with tan spots on the eyes, i. 29; colours of feral horses in, i. 61. MEYEN, on sending of bananas, ii. 168. MICE, grey and white, colours of, not blended by crossing, ii. 92; rejection of bitter almonds by, ii. 232; naked, ii. 279. MICHAUX, F., roan-coloured feral horses of Mexico, i. 61; origin of domestic turkey, i. 292; on raising peaches from seed, i. 339. MICHEL, F., selection of horses in mediæval times, ii. 203; horses preferred on account of slight characters, ii. 209. MICHELY, effects of food on caterpillars, ii. 280; on _Bombyx hesperus_, ii. 304. MICROPHTHALMIA, associated with defective teeth, ii. 328. MIDDENS, Danish, remains of dogs in, i. 18, ii. 427. MIGNONETTE, ii. 237, 311. MILLET, i. 371. MILLS, J., diminished fertility of mares when first turned out to grass, ii. 161. MILNE-EDWARDS, on the development of the crustacea, ii. 368. MILNE-EDWARDS, A., on a crustacean with a monstrous eye-peduncle, ii. 391. _Milvus niger_, ii. 154. _Mimulus luteus_, ii. 128. MINOR, W. C., gemmation and fission in the Annelida, ii. 358. _Mirabilis_, fertilisation of, ii. 363; hybrids of, ii. 131, 169, 265. _Mirabilis jalapa_, i. 382, 393. _Mirabilis longiflora_, ii. 88. _Mirabilis vulgaris_, ii. 88. _Misocampus_ and _Cecidomyia_, i. 5. MITCHELL, Dr., effects of the poison of the rattlesnake, ii. 289. MITFORD, Mr., notice of the breeding of horses by Erichthonius, ii. 202. MOCCAS Court, weeping oak at, ii. 18. MOGFORD, horses poisoned by fool's parsley, ii. 337. MÖLLER, L., effects of food on insects, ii. 281. MOQUIN-TANDON, original form of maize, i. 320; variety of the double columbine, i. 365; {465} peloric flowers, ii. 58-59, 61; position as a cause of pelorism in flowers, ii. 345; tendency of peloric flowers to become irregular, ii. 70; on monstrosities, ii. 254; correlation in the axis and appendages of plants, ii. 321; fusion of homologous parts in plants, ii. 339, 341-342; on a bean with monstrous stipules and abortive leaflets, ii. 343; conversion of parts of flowers, ii. 392. MOLE, white, ii. 332. MOLL and Gayot, on cattle, i. 80, ii. 96, 210. MOLLUSCA, change in shells of, ii. 280. MONKE, Lady, culture of the pansy by, i. 368. MONKEYS, rarely fertile in captivity, ii. 153. MONNIER, identity of summer and winter wheat, i. 315. MONSTER, cyclopean, ii. 341. MONSTERS, double, ii. 339-340. MONSTROSITIES, occurrence of, in domesticated animals and cultivated plants, i. 366, ii. 254; due to persistence of embryonic conditions, ii. 57; occurring by reversion, ii. 57-60; a cause of sterility, ii. 166-167; caused by injury to the embryo, ii. 269. MONTEGAZZA, growth of a cock's-spur inserted into the eye of an ox, ii. 369. MONTGOMERY, E., formation of cells, ii. 370. MOOR, J. H., deterioration of the horse in Malasia, i. 53. MOORCROFT, Mr., on Hasora wheat, i. 313; selection of white-tailed yaks, ii. 206; melon of Kaschmir, ii. 275; varieties of the apricot cultivated in Ladakh, i. 345; varieties of the walnut cultivated in Kaschmir, i. 356. MOORE, Mr., on breeds of pigeons, i. 148, 156, 208, 209, 211. MOORUK, fertility of, in captivity, ii. 156. MORLOT, dogs of the Danish Middens, i. 18; sheep and horse of the bronze period, ii. 427. _Mormodes ignea_, ii. 53. MOROCCO, estimation of pigeons in, i. 205. MORREN, C., on pelorism, ii. 58; in _Calceolaria_, ii. 346; non-coincidence of double flowers and variegated leaves, ii. 167. MORRIS, Mr., breeding of the Kestrel in captivity, ii. 154. MORTON, Lord, effect of fecundation by a quagga on an Arab mare, i. 403-404. MORTON, Dr., origin of the dog, i. 16; hybrid of zebra and mare, ii. 42. _Morus alba_, i. 334. MOSCOW, rabbits of, i. 106, 120; effects of cold on pear-trees at, ii. 307. MOSSES, sterility in, ii. 171; retrogressive metamorphosis in, ii. 361. MOSS-ROSE, probable origin of, from _Rosa centifolia_, i. 379; Provence roses produced from seeds of, i. 380. MOSTO, Cada, on the introduction of rabbits into Porto Santo, i. 113. MOTTLING of fruits and flowers, i. 400. MOUFFLON, i. 94. MOUNTAIN-ASH, ii. 230. MOUSE, Barbary, ii. 152. "MÖVEN-TAUBE," i. 148. MOWBRAY, Mr., on the eggs of game fowls, i. 248; early pugnacity of game cocks, i. 251; diminished fecundity of the pheasant in captivity, ii. 155. MOWBRAY, Mr., reciprocal fecundation of _Passiflora alata_ and _racemosa_, ii. 137. MULATTOS, character of, ii. 46. MULBERRY, i. 334, ii. 256. MULE and hinny, differences in the, ii. 67-68. MULES, striped colouring of, ii. 42; obstinacy of, ii. 45; production of, among the Romans, ii. 110; noticed in the Bible, ii. 202. MÜLLER, Fritz, reproduction of orchids, ii. 134-135; development of crustacea, ii. 368; number of seeds in a _maxillaria_, ii. 379. MÜLLER, H., on the face and teeth in dogs, i. 34, 73, ii. 345. MÜLLER, J., production of imperfect nails after partial amputation of the fingers, ii. 15; tendency to variation, ii. 252; atrophy of the optic nerve consequent on destruction of the eye, ii. 297; on Janus-like monsters, ii. 340; on gemmation and fission, ii. 358; identity of ovules and buds, ii. 360; special affinities of the tissues, ii. 380. MÜLLER, Max, antiquity of agriculture, ii. 243. MULTIPLICITY of origin of pigeons, hypotheses of, discussed, i. 188-194. MUNIZ, F., on Niata cattle, i. 90. MUNRO, R., on the fertilisation of orchids, ii. 133; reproduction of _Passiflora alata_, ii. 138. "MURASSA" pigeon, i. 144. MURPHY, J. J., the structure of the eye not producible by selection, ii. 222. _Mus alexandrinus_, ii. 87-88. _Musa sapientum_, _Chinensis_ and _Cavendishii_, i. 377. _Muscari comosum_, ii. 185, 316. MUSCLES, effects of use on, ii. 297. MUSK duck, feral hybrid of, with the common duck, i. 190. {466} MUSMON, female, sometimes hornless, i. 95. MUTILATIONS, inheritance or non-inheritance of, ii. 22-24, 397. MYATT, on a five-leaved variety of the strawberry, i. 353. MYOPIA, hereditary, ii. 8. MYRIAPODA, regeneration of lost parts in, ii. 15, 294.

NAILS, growing on stumps of fingers, ii. 394. NAIS, scission of, ii. 358. NAMAQUAS, cattle of the, i. 88, ii. 207. NARCISSUS, double, becoming single in poor soil, ii. 167. NARVAEZ, on the cultivation of native plants in Florida, i. 312. _Nasua_, sterility of, in captivity, ii. 152. "NATAS," or Niatas, a South American breed of cattle, i. 89-91. NATHUSIUS, H. von, on the pigs of the Swiss lake-dwellings, i. 68; on the races of pigs, i. 65-68; convergence of character in highly-bred pigs, i. 73, ii. 241; causes of changes in the form of the pig's skull, i. 72-73; changes in breeds of pigs by crossing, i. 78; change of form in the pig, ii. 279; effects of disuse of parts in the pig, ii. 299; period of gestation in the pig, i. 74; appendages to the jaw in pigs, i. 76; on _Sus pliciceps_, i. 70; period of gestation in sheep, i. 97; on Niata cattle, i. 89; on short-horn cattle, ii. 118; on interbreeding, ii. 116; in the sheep, ii. 120; in pigs, ii. 122; unconscious selection in cattle and pigs, ii. 214; variability of highly selected races, ii. 238. NATO, P., on the Bizzaria orange, i. 391. NATURAL selection, its general principles, i. 2-14. NATURE, sense in which the term is employed, i. 6. NAUDIN, supposed rules of transmission in crossing plants, ii. 68; on the nature of hybrids, ii. 48-49; essences of the species in hybrids, ii. 386, 401; reversion of hybrids, ii. 36, 49-50; reversion in flowers by stripes and blotches, ii. 37; hybrids of _Linaria vulgaris_ and _purpurea_, ii. 94; pelorism in _Linaria_, ii. 58, 346; crossing of peloric _Linaria_ with the normal form, ii. 70; variability in _Datura_, ii. 266; hybrids of _Datura lævis_ and _stramonium_, i. 392; prepotency of transmission of _Datura stramonium_ when crossed, ii. 67; on the pollen of _Mirabilis_ and of hybrids, i. 389; fertilisation of _Mirabilis_, ii. 363; crossing of _Chamærops humilis_ and the date palm, i. 399; cultivated Cucurbitaceæ, i. 357-360, ii. 108; rudimentary tendrils in gourds, ii. 316; dwarf _Cucurbitæ_, ii. 330; relation between the size and number of the fruit in _Cucurbita pepo_,