504 



INDEX 



Timiriazeff, Prof, ii. 417 



Timor, Mastodon from, i. 228 ; ii. 16 



Toad, power of Indian species to resist 



sea-water, ii. 16 

 Tobacco, Kolreuter on varieties of, i. 



230 

 Todd, on Solatium rostralum, ii. 292 

 Toledoth Adam, title of book on evolu- 

 tion by N. Lewy, i. 365, 366 

 Torbitt, J., experiments on potatoes, 



and letter to, i. 372-4 

 Torquay, Darwin's visit to, i. 195 

 Tortoises, conversion of turtles into 



land-, i. 170 

 Tortugas, A. Agassiz on reefs of, ii. 197 

 Toryism, defence of, i. 351 

 Toucans, colour of beaks in breeding 



season, ii. 83 

 Trachyte, separation of basalt and, ii. 125 

 Tragopan, ii. 75 



Traill, experiments on grafting, i. 280 

 Transfusion experiments, by Galton, i. 



362 

 Translations of Darwin's books, i. 139, 



172, 174; ii. 145, 146 

 Transplanting, effect on Alpine plants, 



i. 197 

 Transport, occasional means of, i. 480, 



483, 487 

 Travels, Bates' book of, i. 196, 197, 



215 ; Humboldt's, i. 263 ; Wallace's, 



i. 263 

 Travers, H. H., on Chatham Islands, 



i; 475 

 Trecul, on Drosera, ii. 266 



Trees, herbaceous orders and, i. 162, 

 163 ; occurrence in islands, i. 162, 

 163 ; older forms more likely to 

 develop into, i. 481 ; Asa Gray on, 

 ii. 254 ; conditions in New Zealand 

 favourable to development of, ii. 

 250, 251 ; crossing in, ii. 252, 253 ; 

 separate sexes in, ii. 250, 252, 253 



Treub, M., on Chalazogamy, ii. 333 



Treviranus, Prof., ii. 320, 372 ; on 

 Primula longiflora, ii. 324 



Trifolium rcsupinatum, ii. 418 ; Dar- 

 win's observations on bloom on 

 leaflets, ii. 371, 412, 413 



Trigonocephalus, i. 12 



Trilobites, change of genera and species 

 of, i. 398 



Trimen, on painting butterflies, ii. 72 



Trimorphism, in plants, ii. 299 



Trinidad, Catasetum of, ii. 316; Criiger 

 on caprification in, ii. 366 



Tripha-na pronuba, robin attracted by 

 colour of, ii. 67 



Tristan d'Acunha, i. 93; Carmichael on, 

 i. 401 ; vegetation of, i. 425, 426 



Triticum repens var. littorum, bloom- 

 experiments on, ii. 411 



Trollope, A., quotation by Darwin from, 

 i. 37o 



Tropceolum, Darwin's experiments on, 

 ii. 341, 342; peloric variety of, ii. 

 298 ; waxy secretion on leaves, ii. 



36i 



Tropical climate, in relation to colour- 

 ing of insects, ii. 282 



Tropical plants, possible existence 

 during cooler period, i. 437, 438, 

 462, 463, 478, 479 ; ii. 6, 23 ; retreat 

 of, i. 440 



Tropics, climatic changes in, i. 458 ; 

 description of forests in, i. 9, 10, 

 243 ; similarity of orders in, i. 260 



Tubocytisus, Kemer on, i. 317 



Tuckwell, on the Oxford British 

 Association meeting (i860), i. 157 



Tucotuco, i. 169 



Tuke, D. H., on influence of mind on 

 body, ii. 109 ; letter to ii. 109 



Tulips, i, 197 



Turkey, colour of wings, and courtship, 

 ii. 68; muscles of tail of, ii. 106 



Turner, Sir W., Darwin receives as- 

 sistance from, ii. 38 ; on Darwin's 

 methods in correspondence, ii. 105 ; 

 letters to, ii. 37-9, 105-7 



Turratella, i. 22 



Turtles, conversion into land-tortoises, 

 i. 170 



Tussilago, Darwin on seeds of groundsel 

 and, ii. 430 



Twins, Galton's article on, i. 361 



Tylor, article in Journal of the R. 

 Institution^, i. 316 ; on Early His- 

 tory of Mankind, i. 263 



Tyndall, lack of caution, i. 471 ; lecture 

 by, i. 323 ; on the Alps, i. 252 ; 

 review in the Athenaum of, i. 167 ; 

 on valleys due to glaciers, i. 471 ; 

 ii. 191 ; work of, i. 329 ; dogmatism 

 of, ii. 155; on glaciers, ii. 210; on 

 Sorby's work on cleavage, ii. 210; 

 mentioned, ii. 102 



Typhlops, i. 114, 115 



Typical forms, difficult to select, i. 429; 

 vagueness of phrase, i. 403 



Typotherium, Falconer on, i. 240 



Tyrol, Mojsisovics on the Dolomites of 

 the, ii. 197 



Umbelliferae, morphological charac- 

 ters of, i. 273 ; difference in seeds 

 from the same flower, ii. 376 



Undulation of light, comparison be- 

 tween Darwin's views and the theory 

 of, i. 184 



