194 



INDEX. 



Intercrossing, advantages of, 85 



285. 

 Islands, oaeanic, 384. 

 Isolation favorable to selection, 90. 



Japan, productions of, 370. 



Java, plants of, 373. 



Jones, Mr. J. M., on the birds of 

 Bermuda, 386. 



Jourdain, M., on the eye-spots of 

 star fishes, 161. 



Jukes, Prof., on subaerial denuda- 

 tion, 296. 



Jussieu, on classification, 407. 



Kentucky, caves of, 124. 

 Kerguelen-land, flora of, 378, 392. 

 Kidney-bean, acclimatization of, 



128. 

 Kidneys of birds, 129. 

 Kirby, on tarsi deficient in beetles, 



121. 

 Knight, Andrew, on cause of vari- 

 ation, 6. 

 Kolreuter, on intercrossing, 84. 

 on the barberry, 86. 

 on sterility of hybrids, 262, 263. 

 on crossed varieties of nicotiana, 



286. 

 on crossing male and hermaphro- 

 dite flowers, 439. 

 on reciprocal crosses, 269. 



Lamarck, on adaptive characters, 



413. 

 Lancelet, 112. 

 eyes of, 163. 

 Landois, on the development of the 



wings of insects, 166. 

 Land shells, distribution of, 381. 

 of Madeira, naturalized, 386. 

 resisting salt water, 382. 

 Languages, classification of, 410. 

 Lankester, Mr. E. Ray, on longev- 

 ity, 188. 

 on homologies, 426. 

 Lapse, great, of time, 295. 

 Larvae, 429-431. 

 Laurel, nectar secreted by the 



leaves, 81. 

 Laurentian formation, 318. 

 Laws of variation, 119. 

 Leech, varieties of, 66. 

 Leguminosas, nectar secreted by 

 glands, 8L 



Leibnitz' attack on Newton, 466. 

 Lepidosiren, 92, 336. 



limbs in a nascent condition, 441, 

 Lewes, Mr. G. H., on species not 

 having changed in Egypt, 188. 

 on the Salarnandra atra, 439. 

 on many forms of life having been 

 at first evolved, 470. 

 Life, struggle for, 54. 

 Lingula, Silurian, 317. 

 Linnasus, aphorism of, 404. 

 Lion, mane of, 77. 



young of, striped, 429. 

 Lobelia fulgens, 64, 86. 



sterility of crosses, 264. 

 Lockwood, Mr., on the ova of the 



Hippocampus, 210. 

 Locusts transporting seeds, 363. 

 Logan, Sir W., on Laurentian for- 

 mation, 318. 

 Lowness of structure connected 

 with variability, 133. 

 related to wide distribution, 397. 

 Lowe, Rev. R. T., on locusts visit. 



ing Madeira, 362. 

 Lubbock, Sir J., on the nerves o1 

 coccus, 39. 

 on secondary sexual characters, 



139. 

 on a diving hymenopterous in- 

 sect, 159. 

 on affinities, 310. 

 on metamorphoses, 427. 

 Lucas, Dr. P., on inheritance, 11. 

 on resemblance of child to parent, 

 289. 

 Lund and Clausen, on fossils c/ 



Brazil, 344. 

 Lyell, Sir C, on the struggle fc* 

 existence, 55. 

 on modern changes of the earth 



84. 



on terrestrial animals not having 



been developed on islands, 200 



on a carboniferous land-shell, 301 



on strata beneath Silurian system 



364. 

 on the imperfection of the geo 



logical record, 321. 

 on the appearance of species, 322. 

 on Barrande's colonies, 323. 

 on tertiary formations of Europe 



and North America, 330. 

 on parallelism of tertiary fonoar 

 tions, 334. 



