INDEX 



489 



Neottia nidzts-avis, fertilisation mecha- 

 nism, ii. 270; pollen-tubes of, ii. 315 



Nepenthes, Hooker's work on, ii. 398 ; 

 Thiselton-Dyer on, ii. 401 



Neptunia, ii. 397 



Nervous system, genesis of, ii. 424, 

 425 ; influence on nutrition, ii. 106 



Nests, Wallace's theory, of i. 283 ; 

 ii. 60-62, 72-5 ; colour in relation 

 to, ii. 59 ; instinct in making, ii. 75 



Neumann, on Catasetum, ii. 305 



Neumayr, M., biographical note.i. 375 ; 

 essay on descent theory, i. 375 ; 

 ii. 231 ; services to geology, i. 374 ; 

 Die Stdmme des Thierreichs, ii. 231 



Nevill, Lady Dorothy, ii. 278, 403 



New Zealand, absence of leguminosse 

 opposed to continental extension of, 

 i. 418 ; British plants in, i. 102 ; 

 clover never seeded before intro- 

 duction of bees, i. 493 ; ii. 255, 256 ; 

 comparison between flora of Tasmania 

 and, i. 410 ; elevation of mountains 

 in, i. 92 ; flora of, i. 40, 95, 100, 404, 

 406, 491 ; flora of Australia and, 

 i. 445 ; flora of Raoul Island and, 

 i. 436 ; Hooker on flora of, i. 426, 

 489, 491 ; ii. 9 ; Darwin's opinion 

 of Hooker's Flora, i. 434 ; former 

 connection of islands, i. 490 ; former 

 extension of, i. 474; ii. 19, 154; 

 naturalised plants, i. 491 ; peopling 

 of mountains by plants, i. 490 ; pro- 

 portion of annuals, i. 492 ; species 

 of plants common to America, Chili 

 and, i. 426 ; stocked from Antarctic 

 land. i. 491 ; colonising of, ii. 16 ; 

 glacial action in, ii. 154, 162 ; moun- 

 tain-rat of, ii. 154 ; trees of, ii. 250-53 



Newton, Prof. A., note on Strickland 

 by, i. 67 ; description of partridge as 

 agent in dispersal of seeds, ii. 338 



Newton's law of gravity, i. 140 



Niagara, Darwin on Lyell's work on, 

 ii. 150. 



Nightingale, Gould on the, ii. 70 



Noises, observations on children's, 



ii- 55 

 Nolana prostrata, Darwin's experiments 



on, ii. 384 

 Nomenclature, discussion on, 'i. 67-9, 



474 

 North British Review, Fleeming 



Jenkin's review in, i. 282 ; Tait in, 



i-315 

 Norton, Prof. C. E., visits Down, 



i. 309 

 Norway, VonBuch's travels in, ii. 201 ; 



Blytt on flora of, ii. n 

 Norwich, Berkeley's address at Brit. 



Assoc. (1868) meeting at, i. 309; 

 Hooker's address, i. 297, 299, 304 

 Nottingham, i. 302 ; Brit. Assoc. meet- 

 ing (1866) at, i. 480 ; Hooker's 

 lecture on insular floras at, i. 302, 483 

 Notylia, F. Mtiller on, ii. 346, 347 

 Nucula, a persistent type, i. 116 

 Nuneham, Darwin's recollection of trip 



to, i. 66 

 Nutrition, influence of mind on, ii. ic6, 



107 



Nyctitropic movements, ii. 364 : see 

 Sleep-movements 



OBSERVATION, spirit of astronomers in, 

 ii. 252 ; harder work than generalisa- 

 tion, ii. 252; pleasure of, ii. 116 



Observations, not to be trusted without 

 repetition, ii. 353 



Observer, a good theoriser makes a 

 good, i. 176 



Oceanic islands, difference in floras and 

 means of stocking, i. 489 ; connection 

 between continents and, ii. 147 ; 

 former extension of, ii. 135 ; Reade 

 on, ii. 146 ; volcanic nature of, ii. 

 146 



Oceans, age and depth of, i. 91 : perma- 

 nence of, ii. 146, 147 ; as sinking 

 areas, ii. 137 



Ogle, W., on the sense of smell, ii. 102 ; 

 letter to, ii. 102, 103 ; translation of 

 book by Kerner, ii. 392 



Ogleby, reference to his nomenclature 

 scheme, i. 68 



Oken, on Lepas, i. 69 ; Owen on, i. 

 246 



Old characters, reappearance of, ii. 147 



Oldenburgia, i. 163. 



GJdenlandia } ii. 272, 351 



Olfers, i. 69 



Oliver, D., Darwin indebted to for 

 information, i. 469; ii. 341, 342; 

 letters to, ii. 333, 334, 338, 339, 408, 

 409 ; mentioned, i. 260 ; ii. 290, 291, 



295, 327 



Olyra, sleep-movements of, ii. 364 

 Omori, Morse on shell-mounds of, i, 



383 

 Oncidium^ J. Scott's work on, ii. 319, 



321; structure of labellum, ii. 339; 

 O.-flexuosum^ observations by Muller 

 and Scott on, ii. 351 ; self-sterility of, 

 ii. 351 ; O. sphacetatum, Scott on 

 fertilisation of. ii. 322 

 Ophrys, ii. 262 ; 0. apifera, fertilisa- 

 tion-mechanism, ii. 263-5, 2 ^3> 

 337 ; self-fertilisation of, ii. 265 ; 

 O. arachnites, fertilisation of, ii. 283, 

 387 ; habitat, ii. 282 ; O. aranifera, 



