INSANITY. 



INDEX. 



JUAN DE NOVA. 



461 



ibid. ; in the pansy, i. 393 ; of pri- 

 mary characters of Columba licia in 

 crossed pigeons, i. 211; of pecu- 

 liarities of plumage in pigeons, i. 169, 

 170; of peculiarities of foliage in 

 trees, i. 385 ; effects of, in varieties 

 of the cabbage, i. 344. 

 INSANITY, inheritance of, i. 451, ii. 

 55. 



Insects, regeneration of lost parts in, i. 

 358, ii. 284 ; agency of, in fecundation 

 of larkspurs, i. 464 ; effect of changed 

 conditions upon, ii. 141 ; sterile 

 neuter, ii. 171; monstrosities in, ii. 

 257, 385 



Instincts, defective, of silkworms, i. 

 320. 



Interbreeding, close, ill effects of, ii. 

 92-111, 159. 



Intercrossing, of species, as a cause of 

 variation, i. 197; natural, of plants, 

 i. 356 ; of species of Canidae and 

 breeds of dogs, i. 32-34 ; of domestic 

 and wild cats, i. 46, 47 ; of breeds of 

 pigs, i. 74, 81 ; of cattle, i. 86; of 

 varieties of cabbage, i. 343 ; of peas, 

 i. 345, 348, 349 ; of varieties of 

 orange, i. 357 ; of species of straw- 

 berries, i. 373, 374; of Cucurbitce, i. 

 380, 381 ; of flowering plants, i. 388 ; 

 of pansies, i. 392. 



Interdigital pits, in goats, i. 106. 



Intermarriages, close, ii. 102, 103. 



Intestines, elongation of, in pigs, i. 

 77 ; relative measurement of parts 

 of, in goats, i. 106 ; effects of changed 

 diet on, ii. 292. 



Ipomasa purpurea, ii. 108. 



Ireland, remains of Bos frontosus and 

 longifrons found in, i. 85. 



Iris, hereditary absence of the, i. 454 ; 

 hereditary peculiarities of colour of 

 the, ibid. ; variation of, i. 412. 



Iris xiphium, i. 412. 



Irish, ancient, selection practised by 

 the, ii. 187. 



Iron period, in Europe, dog of, i. 18. 



Islands, oceanic, scarcity of useful 

 plants on. i. 328. 



Islay, pigeons of, i. 193. 



Isolation, effect of, in favour of selec- 

 tion, ii. 219, 220. 



Italy, vine-growing in, during the 

 Bronze period, i. 352. 



Ivy, sterility of, in the north of Europe, 

 ii. 154. 



Jack, Mr., effect of foreign pollen on 



grapes, i. 430. 

 Jackal, i. 25, 28, 31 ; hybrids of, with 

 the dog, i. 33 ; prepotency of, over 

 the dog, ii. 43. 

 Jackson, Mr., white-footed cats, ii. 



316. 

 Jacobin pigeon, i. 161, 218. 

 Jacquemet-Bonnefort, on the mul- 

 berry, i. 354. 



Jaeger, Prof., on reversion in pigs. 

 from a cross, ii. 17; white pigeons 

 killed by hawks, ii. 215. 



Jaguar, with crooked legs, i. 17. 



Jamaica, feral dogs of, i. 28; feral 

 pigs of, i. 80; feral rabbits of, i. 116. 



Jameson, Mr., on hybrid potatoes, i. 

 421. 



Japan, horses of, i. 56. 



Japanese pig (figured), i. 72. 



Jardine, Sir W., crossing of domestic 

 and wild cats, i. 46. 



Jarves, J., silkworm in the Sandwich 

 Islands, i. 318. 



Java, fantail pigeon in, i. 155. 



Javanese p.mies, i. 56, 61. 



Jeitteles, history of the dog, i. 15 ; 

 history of the fowl, i. 258 ; Hun- 

 garian sheep-dogs, i. 24; crossing of 

 domestic and wild cats, i. 46. 



Jemmy Button, i. 326. 



Jenyns, L., whiteness of ganders, l. 

 303 ; sunfish-like variety of the 

 goldfish, i. 313. 



Jerdon, J. C, number of eggs laid by 

 the pea-hen, ii. 191 ; origin of 

 domestic fowl, i. 248. 



Jersey, aborescent cabbages of, i. 341. 



Jessamine, i. 418. 



Jesse, G. R., on the bulldog, i. 44. 



John, King, importation of stallions 

 from Flanders by, ii. 187. 



Johnson, D., occurrence of stripes on 

 young wild pigs in India, i. 80. 



Jordan, A., on Vibert's experiments on 

 the vine, i. 352 ; origin of varieties 

 of the apple, i. 372 ; varieties of 

 pears found wild in woods, ii. 247. 



Jourdan, parthenogenesis in the silk- 

 moth, ii. 357. 



Juan de Nova, wild dogs on, i. 27. 



