I M i I X 





•nts, 

 i. 2* : s l, 



- ; i i . i 1" 



Mad- ira, i. 488 ; I on 



American, i , a of, 



i. 261 ; ii. I 



nparison with mammals, i. 1 

 as isolated i. 229. 234 •, 



Madeira, i 488; modification in, i. 

 162 ; An Irew Mm ray on W 

 theory of nests, i. 304; Walla 

 t!i. 1. 2S3, 304 ; ii. 72-4 ; 



agents in dispersal of land-mollu 

 ii. 13 ; antics during courtship, ii. 

 68 ; courtesy towards own im 

 ii. 56 ; expression oi fear by erer 

 of feathers, ii. 103 ; means of produc- 

 ing music, ii. S2 ; spurs on fen 

 ii. 62 ; pairing, ii. 05, 66, 70 ; 

 polygamy, ii. 65 : propi rtion 

 sexes, ii. 67 ; sexual selection and 

 colour, ii. 6l, 63, 68, 

 traded by singii Ifinch, ii. 81; 



lameness in Brazilian species, ii. 353; 

 occurrence of unpaired, ii. 66, 70; 

 Weir's observations on, ii. 83 

 Bird of paradise, ii. 63, 89 ; and 1 



gamy, ii. 69 

 Birmingham, British Assoc, meeting 



(1849), i. 66 

 Bivalves, means of di 



water, ii. 28, 29 

 Bizcacha, Inn rowing animal of I 



gonia, ii. 361 

 Blackbiid, variation in tufted, i. 262 

 Blair, Rev. R II., observations on the 



blind, ii. 109 

 Blal. . on Elephants in Gee 



i. 227 

 Blanford, II. !'., on an Indo-oceanic 



continent, ii. 15 

 Blanford, W. T., obituary notici 



umayr by, i. 375 

 Blind, expression of those born. ii. 109 

 Blomefield, I.. : seejenyns, 1 . 

 Bloom, Darwin's work on, i. 360: ii. 

 2. 368, 392, 398409-1.3. 423 : 

 F. Darwin on connection between 

 stomata and, ii. 37" 1 - 

 win, I rain on, ii. ■ 



on leaf of Trx 

 ii. 371 ; prote< ion again I | 

 ii. 411 ; on s 411 



Blow-fly, Lowne on the, ii 

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

 63; reference to letter from, i. 155: 

 visits Down, i. ?oo : on Gallina 

 ii. 80 

 Blytt, A., biographical note, ii. 11; 

 essay on immigration o( Norwegian 



11,17: ii. 1 1 



207 



'i- 



'35 

 ier, on | Spain, i. 4 



354 

 Bolbopkyl!:t ., Darwi 



ii. 320 



■ ia, geology of, i. 27 : ii. 141, 

 Bollaert's Antiquities of S. Ann 



Bembus, diversity in generative organs, 



i. 251 ; Psithyrus in ne- -62 ; 



pollen-collecting apparatus of male, 



ii. 97 

 Bombycilla, protectivi 1 . ii. 87 



1. ii. 66, 70 

 Bonaparte, L.. on Bas jue and Finnish 



language, i. 467 

 Bonat . ii. 91 ; 



structure of flower, ii 

 Bonney's Edition of Darwin's ( 



Reej , ii. 197 ; Charles L. 

 . ii. 118 

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

 Boragineae, dimorphism in, ii. 200 

 Borneo, New Zealand and Australian 



plants in, i. 490 : temperate plai;' 



lowlands, i. 491 : possible region 



remains of early man, ii 



i urbon, i. 407 



Bosquet, cirr urograph sent by 



Darwin to, i. 75 ; gives Darwin note 



on fossil ChtkatnaluSf i. 

 Botanical collections (national), con- 

 11 at Kew, i. 

 ■list. Darwin as, i. 234.400; ii. 



278, 3°7- 30S 



iy, ii. 242-434 : philosophical 

 it in study of, i 430 

 Boulders, transpc 



166-8 (see also Erratic 

 Darwin h, ii. 168 : in 



Gl< n Roy, ii. 17-1 ; on Moel Trj 

 ii. 166. : 



7 

 nemouth, Darn in's viMt 1 

 • 

 ii. 279 

 Bowc r, Prof. F. O., 



427. --' N 



Lett's experiments on, 

 ii. 57 : colours discrimini i. 57 



man, W.. 1 

 98, supplies Darwin with : 



on Expression, ii. 98, 

 Brachiopods, Morse on, i. 350 ; Silurian 

 i. no 



