45o 



INDIVIDUALS. 



INDEX. 



LUCAS. 



Individuals, many, whether simulta- 

 neously created, 322. 



Inheritance, laws of, 10. 



, at corresponding ages, 10, 67. 



Insects, colour of, fitted for their 

 stations, 66. 



, sea-side, colours of, 107. 



, blind, in caves, 110. 



■, luminous, 151. 



. , their resemblance to various 



objects, 181. 

 -, neuter, 230. 



Instinct, 205. 



, not varying simultaneously 



with structure, 229. 

 Instincts, domestic, 209. 

 Intercrossing, advantages of, 76, 251. 

 Islands, oceanic, 347. 

 Isolation favourable to selection, 81. 



J. 



Japan, productions of, 334. 



Java, plants of, 337. 



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

 Bermuda, 348. 



Jourdain, M., on the eye-spots of 

 star-fishes, 144. 



Jukes, Prof., on subaerial denuda- 

 tion, 267. 



Jussieu, on classification, 367. 



E. 



Kentucky, caves of, 111. 



Kerguelen-land, flora of, 341, 354. 



Kidney-bean, acclimatisation of, 114. 



Kidneys of birds, 115. 



Kirby, on tarsi deficient in beetles, 

 108. 



Knight, Andrew, on cause of varia- 

 tion, 5. 



Kolreuter, on Intercrossing, 76. 



, on the barberry, 77. 



, on sterility of hybrids, 237. 



, on reciprocal crosses, 243. 



, on crossed varieties of nico- 

 tiana, 258. 



— — , on crossing male and herma- 

 phrodite flowers, 397. 



L. 



Lamarck, on adaptive characters, 



373. 

 Lancelet, 99. 

 — — , eyes of, 145. 



Landois, on the development of the 



wings of insects, 148. 

 Land-shells, distribution of, 353. 



, of Madeira, naturalised, 357. 



, resisting salt water, 353. 



Languages, classification of, 371. 

 Lankester, Mr. E. Ray, on Longevity, 



169. 

 — — , on homologies, 385. 

 Lapse, great, of time, 266. 

 Larva?, 388, 389. 

 Laurel, nectar secreted by the leaves, 



73. 

 Laurentian formation, 287. 

 Laws of variation, 106. 

 Leech, varieties of, 59. 

 Leguminosse, nectar secreted by 



glands, 73. 

 Leibnitz' attack on Newton, 421. 

 Lepidosireri, 83, 303. 

 — — , limbs in a nascent condition, 



398, 399. 

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

 ing changed in Egypt, 169. 



, on the Salamandra atra, 397. 



, on many forms of life having 



been at first evolved, 425. 

 Life, struggle for, 49. 

 Lingula, Silurian, 286. 

 Linnseus, aphorism of, 365. 

 Lion, mane of, 69. 



, young of, striped, 388. 



Lobelia fulgens, 57, 77. 



, sterility of crosses, 238. 



Lockwood, Mr., on the ova of the 



Hippocampus, 189. 

 Locusts transporting seeds, 327. 

 Logan, Sir W., on Laurentian forma- 

 tion, 287. 

 Lowe, Rev. R. J., on locusts visiting 



Madeira, 327. 

 Lowness of structure connected with 



variability, 118. 

 , related to wide distribution, 



359. 

 Lubbock, Sir J., on the nerves of 



coccus, 35. 



, on secondary sexual characters, 



124. 



— on a diving hymenopterous 

 insect, 142. 

 — , on affinities, 280. 



-, on metamorphoses, 386, 389. 



Lucas, Dr. P., on inheritance, 9. 



