INDEX 



455 



Birds, as agents of dispersal of plants, 

 i. 284, 285, 436, 441, 442, 483, 484, 

 487 ; ii. 251, 348. 349 ; blown to 

 Madeira,!. 488 ; climate and effect on 

 American, i. 356, 357 ; coloration of, 

 i. 261 ; ii. 61, 63, 68, 71, 79 ; 

 comparison with mammals, i. 168 ; 

 as isolated groups, i. 229, 234 ; of 

 Madeira, i. 488 ; modification in, i. 

 162 ; Andrew Murray on Wallace's 

 theory of nests, i. 304 ; Wallace's 

 theory of nests, i. 283, 304 ; ii. 72-4 ; 

 agents in dispersal of land-molluscs, 

 ii. 13 ; antics during courtship, ii. 

 68 ; courtesy towards own image, 

 ii. 56 ; expression of fear by erection 

 of feathers, ii. 103 ; means of produc- 

 ing music, ii. 82 ; spurs on female, 

 ii. 62 ; pairing, ii. 65, 66, 70 ; 

 polygamy, ii. 65 ; proportion of 

 sexes, ii. 67 ; sexual selection and 

 colour, ii. 61, 63, 68, 71, 79; at- 

 tracted by singing of bullfinch, ii. 81 ; 

 tameness in Brazilian species, ii. 353; 

 occurrence of unpaired, ii. 66, 70 ; 

 Weir's observations on, ii. 83 



Bird of paradise, ii. 63, 89 ; and poly- 

 gamy, ii. 69 



Birmingham, British Assoc. meeting 



(1849), i- 66 



Bivalves, means of dispersal of fresh- 

 water, ii. 28, 29 



Bizcacha, burrowing animal of Pata- 

 gonia, ii. 361 



Blackbird, variation in tufted, i. 262 



Blair, Rev. R. H., observations on the 

 blind, ii. 109 



Blake, paper on Elephants in Geologist^ 

 i. 227 



Blanford, H. F., on an Indo-oceanic 

 continent, ii. 15 



Blanford, W. T., obituary notice of 

 Neumayr by, i. 375 



Blind, expression of those born. ii. 109 



Blomefield, L. : see Jenyns, L. 



Bloom, Darwin's work on, i. 369 ; ii. 

 361, 362, 368, 392, 398 409-13, 423 ; 

 F. Darwin on connection between 

 stomata and, ii. 370 (see also Dar- 

 win, F.) ; effect of rain on, ii. 370 ; 

 on leaf of Trifolium resupinatum^ 

 ii. 371 ; protection against parasites, 

 ii. 411 ; on seashore plants, ii. 411 



Blow-fly, Lowne on the, ii. 94 



Blyth, E. , biographical note, i. 62, 

 63; reference to letter from, i. 155 ; 

 visits Down, i. 309 ; on Gallinacese, 

 ii. 80 



Blytt, A., biographical note, ii. ii ; 

 essay on immigration of Norwegian 



flora during alternating rainy and dry 

 periods, ii. 1 1, 17; letter to, ii. ii 



Bog-Mammoth, i. 207 



Boiler, comparison with volcano, ii. 



134, 135 



Boissier, on plants of S. Spain, i. 481 

 Boissiera, crossing experiments on, ii. 



354 

 Bolbophylhun, Darwin's account of, 



ii. 320 



Bolivia, geology of, i. 27 ; ii. 141, 144 

 Bollaert's Antiquities of S, America, 



i. 227 

 Bombus, diversity in generative organs, 



i. 251 ; Psithyrus in nests of, i. 262 ; 



pollen-collecting apparatus of male, 



ii. 97 



Bomby cilia, protective colours, ii. 87 

 Bombyx, sexes in, ii. 66. 70 

 Bonaparte, L., on Basque and Finnish 



language, i. 467 

 Bonatea speciosa, F. Miiller on, ii. 91 ; 



structure of flower, ii. 278 

 Bonney's Edition of Darwin's Coral 



Reefs, ii. 197 ; Charles Lyell and 



Modern Geology, ii. 118 

 Bonnier, G., on alpine plants, i. 47 

 Boragineae, dimorphism in, ii. 2^0. 282 

 Borneo, New Zealand and Australian 



plants in, i. 490 ; temperate plants in 



lowlands, i. 491 ; possible region for 



remains of early man, ii. 37 

 Bory's Flora of Bourbon, i. 407 

 Bosquet, cirripede monograph sent by 



Darwin to, i. 75 ; gives Darwin note 



on fossil Chthamalus, \. 97 

 Botanical collections (national), con- 

 solidation at Kew, i. no 

 Botanist, Darwin as, i. 234, 400 ; ii. 



278, 307, 308 

 Botany, ii. 242-434 ; philosophical 



spirit in study of, i. 430 

 Boulders, transport of erratic, i. 64 ; ii. 



1 66-8 (see also Erratic blocks) ; 



Darwin on Ashley Heath, ii. 168 ; in 



Glen Roy, ii. 179 ; on Mcel Tryfan, 



ii. 166, 167 



Bourbon, Bory's Flora of, i. 407 

 Bournemouth, Darwin's visit to, ii. 288 

 Bovey Tracey, Heer on fossil plants of, 



ii. 279 

 Bower, Prof. F. O., on Welwitschia, ii. 



427, 428 

 Bower-bird, Bartlett's experiments on, 



ii. 57 ; colours discriminated by, ii. 57 

 Bowman, W., Letters to, i. 372 ; ii. 



98, 99 : supplies Darwin with facts 



on Expression, ii. 98, 99 

 Brachiopods, Morse on, i. 350 ; Silurian 



i. 116 



