502 



INDEX 



America, not likely to occur in Eng- 

 land, ii. 386 



Statistics, of births and deaths, i. 50 ; 

 Asa Gray's N. American plant-, 

 i. 432-4 



Steinheim, Lias rocks of, i. 347 

 Stellaria media, cross-fertilisation of, 



ii. 414 



Stephens, Miss Catherine, i. 6 

 Sterile, use of term, i. 48, 411 

 Sterility, accumulation through Natural 

 Selection, i. 297, 298 ; arguments re- 

 lating to, i. 293 ; artificial production 

 of, i. 223 ; between allied species 

 aided by Natural Selection, i. 288 ; 

 connection with sexual differentiation, 

 i. 223 ; and crossing, i. 230, 231, 295 ; 

 domestication and loss of, i. 274, 

 387 ; experiments on, i. 224, 226 ; 

 of hybrids, i. 287-93, 295-9 '> in- 

 human beings, i. 224, 225 ; Huxley 

 on, i. 225, 230, 231 ; increase of 

 races and, i. 294 ; laws governing, 

 i. 288 ; Natural Selection and, i. 289, 

 296 ; in pigeons, i. 222 ; in plants, 

 ii- 347 348 (see also self-sterility) ; 

 reciprocal crosses and unequal, i. 

 293, 294 ; selection and, i. 288 ; 

 variations in amount of, i. 291 ; varie- 

 ties and, i. 294 

 Stirling, and Huxley, i. 316 

 Stokes, Sir G., ii. 443 

 Strasburger, on fertilisation of grasses, 



ii. 291 

 Stratification, and cleavage, ii. 200, 202, 



208 

 Strephium, vertical position of leaves, 



ii. 364 



Strezlecki, i. 89 

 Strickland, H., letters to, i. 67-70 ; on 



zoological nomenclature, i. 67-9 

 Stripes, loss and significance of, ii. 63 

 Structural dissimilarity, and sterility 



i. 295 

 Structure, external conditions in relation 



to, i. 306 



Struggle for existence, i. 165, 192, 268 ; 

 and crossing, i. 288 ; factors concerned 

 in, i. 326 ; and hybrids, i. 290-92 ; J. 

 Scott on, i. 239 



Strychnos, F. Miiller on, ii. 345 

 Student, Darwin as an Edinburgh, i. 



5-8 

 Studer, B., on cleavage and foliation, 



ii. 200, 20 1 

 Studien znr Descendenz- Theorie, Weis- 



mann's, i. 356 

 Studies in the Theory of Descent, Mel- 



dola's translation of Weismann's 



book, i. 350 



Study of Sociology ) II. Spencer's, i. 351 



Stur, D., ii. 141 



Style, Darwin on, i. 220; ii. 2, 322 ; 

 Darwin on Huxley's, i. 237 ; effect 

 of controversy on, ii. 155 



Suada, bloom on, ii. 411 



Submergence, i. 90, 91 



Subsidence, evidence of, i. 56, 209, 

 467 ; coral reefs and, ii. 227 ; and 

 elevation, ii. 123, 136, 138, 147 ; 

 equable nature of, ii. 189 ; large areas 

 simultaneously affected by, ii. 138 ; 

 in oceans, ii- 195, 198 ; and sedimen- 

 tation, ii. 228 ; and volcanic action, 

 ii. 144 



Subterranean animal, existence in Pata- 

 gonia of supposed, ii. 361 



Subitlaria, fertilisation of, i. 416 ; ii. 



255 

 Succession of types, i. 132, 133 



Sudden appearance of organisms, due 

 to absence of fossils in pre- Cambrian 

 rocks, i. 398 



Sudden jumps, modification by, i. 147, 

 1 66 ; Darwin's disbelief in, i. 335 



Suess, i, 244 ; Antlitz der Erde, ii. 167 



Suffolk Crag, comparison with recent 

 strata, ii. 233 



Sugar-cane, Barber on hybrids of, 

 i. 389 ; new varieties of, i. 390 



Sulivan, Admiral, on Patagonia, ii.234 



Superficial deposits, geological nature 

 of, ii. 1 68 



Supernumerary members, i. 251 ; am- 

 putation followed by regeneration of, 



i- 3 6 3 

 " Survival of the fittest," Darwin on 



use of the expression, i. 270, 271 ; 



Wallace on the expression, i. 268, 



269 ; sharpness of thorns the result of, 



i. 308 ; colour of birds and, ii. 62 

 Swainson, i. 305 ; on wide range of 



genera, i. 403 

 Switzerland, Tyndall on valleys of, 



ii. 191 



Sydney, i. 27 

 Symonds, W. S., biographical note, 



i. 1 70 ; on imperfection of geological 



record, i. 170 



TACSONIA, Darwin on flowers of, ii. 



380 ; fertilisation by humming-birds, 



ii. 357, 383 ; Scott's w r ork on, ii. 311 

 Tahiti, coral reefs of, ii. 141, 196 ; 



Darwin on, ii. 155, 225, 227 

 Tails of diluvium, in Scotland, ii. 149 

 Tait, Prof. P. G., article in North 



British Review, i. 316 ; on age of 



world, ii. 212 

 Tait, L., letters to, i. 358, 359, 363 



