INDEX 



497 



Rhododendron Boothii, ii. 297 



Rhopalocera, breeding in confinement, 

 ii. 96 



Rhynchcea, colour of, ii. 60 



Rich. A. note on, ii. 445 ; legacy to 

 Huxley, ii. 445, 446 ; letter to, ii. 

 446-8 ; leaves his fortune to Darwin, 

 ii. 445, 446 



Rich, Mrs., mentioned, ii. 125 



Richardson, R., on tablet to com- 

 memorate Darwin's lodgings at II, 

 Lothian Street, Edinburgh, i. 6 



Richardson, Darwin on merits of, ii. 230 



Rigaud, on formation of coal, ii. 219 



Riley, C. V. biographical note on, ii. 

 385 ; letters to, ii. 385, 386 ; men- 

 tioned, i. 248, 357 



Rio Janeiro, i. 8, 9, 15, 19 ; absence of 

 erratic boulders near, i. 476 ; Agassiz 

 on drift-formation near, ii. 161 



Rio Negro, i. 10 



Rio Plata, i. 8 



Ritchie, Mrs., visit to Down, ii. 448 



Rivers. T.. letters to, i. 275-7, 279. 



Robin, attracted by colour of Triphutna, 

 ii. 67 



Robinia, insect visitors of, ii. 253 



Rocks, bending when heated, ii. 132, 

 133 ; condition in interior of earth, 

 ii. 134; fluidity of, ii. 206, 207; 

 metamorphism of, ii. 132 (see also 

 Metamorphism) 



Rocky Mountains, wingless insects of 

 the, i. 262 



Rogers, W. B. and H. D., on cleavage, 

 ii. 201 ; on coalfields of N. America, 

 ii. 217 ; on parallelism of axis- 

 planes of elevation and cleavage, 

 ii. 20 1, 204 



Rolleston, G. , biographical note, ii. 46 ; 

 address in Nature by, i. 323 ; on the 

 orang-utang, i. 185 ; adhesion to 

 Darwin's views, ii. 46 ; letter to, ii. 

 47 ; letter to Darwin from, ii. 46 ; 

 mentioned, ii. 75, 442 



Rollisson, ii. 403 



Roman villa at Abinger, ii. 213 



Romanes, G. J., note on, i. 352 ; 

 Darwin on controversy between Duke 

 of Argyll and. i. 396 ; on graft- 

 hybrids, i. 280 ; letters to, i. 354, 359, 

 360, 363-5, 367, 368, 370, 371, 

 389-90, 395, 396 ; ii. 48, 49, 51, 52, 

 213,214,406-8, 431, 432, 436, 437; 

 letter to Darwin from, i. 352-4 ; 

 letter to Nature in reply to the Duke 

 of Argyll, i. 395, 396 ; on physio- 

 logical selection, i. 223, 299 ; review 

 of Roux's book, i. 395, 396 ; on 

 heliotropism, ii. 431 ; lecture on 



VOL. II. 



animal intelligence by, ii. 48, 49 ; 



lecture on evolution of nerves, ii. 



407, 408 ; letter to Times from, ii. 



49 ; Life and Letters of. ii. 48 ; on 



minds of animals, ii. 214 

 Roots, heliotropism of, ii. 418 ; sensitive 



tip of, ii. 424, 426 

 Roses, N. American species, i. 444 ; 



bud-variation, i. 275 ; raising from 



seed, i. 279 ; resemblance of seedling 



moss-rose to Scotch, i. 279 ; varieties 



of i. loo 



Ross, Sir J., i. 65 

 Rosse, Lord, i. 79 



Round Island, fauna and flora of, ii. 10 

 Roux's Struggle of Parts in the 



Organism, i. 395, 396 

 Royal Commission on Vivisection, ii. 



435- 436 

 Royal Institution, lectures at, i. 82, 89, 



129-31, 386. 387 

 Royal medals, i. 79, 80, 81, 88 ; ii. 131, 



231 

 Royal Society, council meeting of, i. 



80, 81 

 Royer, Mdlle.,translatressof the Origin, 



i. 202 ; ii. 288 

 Royle. J. F., biographical note, i. 67 ; 



letters to, i. 67 ; mentioned, ii. 243 

 Rubiaceae, dimorphism in, ii. 351, 352 ; 



fertilisation in, ii. 261 

 Rubus, N. American species, i. 444 ; 



variation in, i. 100 ; F. Darwin on 



roots of, ii. 429 

 Rubus and Hieracium, comparison of 



variability of N. American and 



European species, i. 425 

 Rucker, ii. 276 

 Rudimentary organs, i. 352 ; in frogs, 



i. 251 ; nascent and, i. 162 ; variation 



of i. 353 ; in man, ii. 37-9 ; use in 



classification, ii. 379 

 Rudinger, Dr., on regeneration, i. 363 

 Rue, flowers of, ii. 376, 378 

 Ruffs, polygamy of, ii. 69 

 Rumex^ germination of old seeds, ii. 



244, 246 ; ii. 402 

 Russia, forms of wheat cultivated in, 



ii. 419-22 

 Rutacese, A. St.-Hilaire on difference 



in ovary of same plants of, ii. 376 



SABINE, GENERAL, biographical note, 

 i. 257 ; address to R. Society, i. 

 255, 256 ; award of Copley medal to 

 Darwin during presidency of, i. 257 ; 

 recognition by Government, i. 315; 

 mentioned, i. 88 ; ii. 153 



Sabrina, elevation of, ii. 114 



Sagitta, i. 86 



32 



