INDEX. 



415 



TWINING. 

 Twining plants, iii. 315. 

 Twisting of the uppermost internodes 



in Echinocystis lobata, iii. 311, 312. 



Tylor, E. B., letter to, on ' Primitive 



. Culture,' iii. 151 ; 'Researches into 



the Early History of Mankind,' iii. 



40. 

 Tyndall, J. , Presidential Address to the 



British Association at Belfast, 1874, 



iii. 189. 

 Types, creation of distinct successional 



and aboriginal, ii. 340 ; possible 



intermediate, ii. 344. 

 Typhlops, ii. 210. 



' Unfinished Book,' ii. 67. 



Unitarianism, Erasmus Darwin's defini- 

 tion of, ii. 158. 



United States, angiospermous plants in 

 cretaceous beds of the, iii. 248. 



, Northern, flora of the, ii. 88. 



Unorthodoxy, ii. 152. 



Upper Gower Street, residence in, i. 

 69-78. 



Usborne, A. B., reminiscences of C. 

 Darwin, i. 224. 



Utricularia, observations on, iii. 326, 

 327 ; a carrion-feeder, iii. 327. 



montana, observations on, iii. 



327. 



Valparaiso, letter to C. Whitley from, 

 i. 254 ; letter to Miss C. Darwin 

 from, i. 256 ; letter to Miss S. Darwin 

 from, i. 259. 



Van Dyck, Dr. W. T., letter to, on 

 his paper on the mongrelisation of 

 the dogs in Beyrout, iii. 252. 



Vanilla, iii. 265. 



Variability, ii. 158 ; amount and re- 

 strictions of, ii. 339, 340 ; causes of, 

 iii. 80 ; causes of in plants, iii. 342- 

 346 ; degree of, in high and low 

 organisms, ii. 388 ; rate of, in terres- 

 trial and marine organisms, ii. 388 ; in 

 widely distributed genera, iii. 155 ; 

 in the same genus during successive 

 geological formations, iii. 156 ; of 

 highly developed organs, ii. 97, 99, 

 101 j of species in large genera, ii-. 



VIRCHOW. 



102-107 ; of the Cirripedia, ii. 37 ; 



periodical, iii. 158. 

 Variation, ignorance of the causes of, 



ii. 90. 



and natural selection, ii. 87. 



' Variation of Animals and Plants under 



Domestication,' progress of the work, 



»• 356, 357, 390; iii- 1; i". 42; 

 publication of, i. 93 ; iii. 59, 75 ; 



American edition of the, iii. 84 ; 



preparation of second edition of the, 



iii. 194. 

 1 ,' reviews of the, in the Pall 



Mall Gazette, iii. 76 ; in the Athe- 



ncBum, iii. 77, 79 ; in the Gardeners' 



Chronicle, iii. 77 ; in the Nation, iii. 



84 ; in the Daily Review, iii. 85. 

 'Variation of Species,' Wollaston's, ii. 



73- 



Variation under culture and in nature, 

 ii. 346. 



Variations, single, and individual differ- 

 ences, relative importance of, iii. 

 107, 109. 



specially ordered or guided, 



iii. 62. 



Varieties, small species, ii. 105. 



Vegetable Kingdom, cross- and self- 

 fertilisation in the, i. 96, 97. 



Verbascum, natural hybrids of, iii. 297 ; 

 partial sterility of varieties of, when 

 crossed, ii. 384. 



' Vestiges of the Natural History of 

 Creation,' ii. 187-188, remarks on 

 the, i. 333 ; Sedgwick's review of 

 the, i. 344. 



Victoria Institute, analysis of the 

 ' Origin ' read before the, iii. 69 

 note. 



Vinca major, action of insects on, iii. 



261. 

 Vines, S. H., letter to, on aggregation 



in plant-cells, iii. 346. 

 Viola, cleistogamic flowers of, iii. 307, 



308, 309. 



canina, fertilisation of, bv in- 

 sects, iii. 309. 



Virchow, Prof., connection of socialism 

 with the theory of descent, iii. 236, 

 237. 



Virchow's experiments on Trichina:, 

 iii. 203. 



