• E X 





Rhododendron Boo/An, ii. 297 



liny in confinen 



ii. 96 



Rhynckeea, colour of, ii. 60 



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

 Huxley, ii. 445, 440 ; o, ii. 



446-8; leaves his fortune to Darwin, 

 ii. 445, 446 



Rich, Mr-., mentioned, ii. 125 



Richardson, R., on tablet to 1 

 memorate Darwin's lodgings at 11, 

 nun Street, Edit burgh, i. 6 



Richardson, Darwin on merits of, ii. 230 



Rigaud, on formation of coal, ii. 219 



Rile)-, C. Y. biographical note on, ii. 

 385 ; letters to, ii. men- 



tioned, i. 248, 357 



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

 erratic boulders near, i. 470 : Ag 

 on drift-formation near, ii. 161 



Rio Xegro, i. 10 



Rio Plata, i. 8 



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



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



Robin, attracted by colour of 7 

 ii. 67 



Robiuia, 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. 15. and II. D., on clea\ 

 ii. 201 ; on coalfields of N. America, 

 ii. 217 ; on parallelism of axis- 

 planes of elevation and clca\ 

 ii. 201, 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. 2!>o ; letters to, i. ^54, 359, 

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

 3S9-90, 395, 396 ; ii. 4 S, 49, 51, 52, 

 213, 214,400-8, 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. 22^, 299 ; review 

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

 heliotropism, ii. 431 ; lecture on 



VOL. II. 



animal intelligence 48. 49 ; 



let . ii. 



407 . ii. 



49 : . id I. titers of ii. ., ! 



mini imals, ii. 



. - 



5, \. American -] ecies, i. 



ii, i. 275 ; raising :. 

 seed, i. 279 : lance ot 



rose to Scotch, i. 279 ; varie 

 of i. 100 



.r J., i. 65 

 . i. 79 

 Round Island, fauna and flora of, ii. 10 

 .'s Struggle of Parts in 



»'«"i i- 395. 396 

 .1 Commission on Vivisection, ii. 



135- 436 

 Royal Institution, lectures at, i. S2, S9, 

 129-31, 386. 387 

 ..1 medals, i. 79. 80, Si. 88 ; ii. 131, 



■' 



J Society, council meeting of, i. 



80. 

 Royer, Mdlle.,translatressof the 0. 



i. 202 ; ii. 28S 

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



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

 Rubiacece, dimorphism in, ii. 351, 352 ; 



fertilisation in, ii. 261 

 Rubu . X. American species, i. 444 ; 



variation in. i. 100; F. Darwin 



roots of, ii. 429 



'/, comparis 



variability of X. American and 



Eui :cies, i. 425 



Rucker. ii. 276 

 Rudimentary organs, i. 352 ; in fi 



i. 251 ; nascent and. i. 102 : variation 

 . 353 : in man, ii. 37-9 ; use in 



classification, ii. 

 Rudinger, Dr.. on regeneration, i. 363 

 Rue, flowers of. ii. 3: 

 Ruffs, polygamy of, ii. 69 

 Rumex, germination of old seed 



j. 246 : ii. 402 

 Russia, forms of wheat cultivated in, 



ii. 419-22 

 Rutacese, A. St.-Hilaire on differ 



in ovary of same plants of. ii. 



Sabine, General, biographical note, 



i. 257 - -iety. i. 



2;;. 256 : award o( Copley • 



Darwin during ; 



recognition by Government, i. 315; 



mentioned, i. 88 : ii. 153 

 Sabrina, elevation of, ii. 1 14 

 Sag;, '.'a. i. 86 



32 



