622 



GENERAL INDEX. 



DAU 



Darwin, Mr. C, on coral islands, ii. 



584, 586, 589 

 cause of their circular form, ii. 



591 

 ■ coloured corolla attracting in- 

 sects, ii. 309 



correlated variability, ii. 314 



decrease of bulk in half-wild 



cattle, ii. 321 



earthquakes, ii. 89 



elevated marine strata atLima, 



ii. 158 



geographical relationship of 



fossil to living mammalia, ii. 334 



growth of coral, ii. 574, 599 



natural hybrids, ii. 324 



■ * incipient species,' ii. 462 



■ limits to variability of a 



species, ii. 300 

 — multiple origin of the dog, ii. 



293 



DEL 



316 



natural selection, ii. 277-281, 



against theory of ' necessary de- 



velopment,' ii. 488 



- — on our ignorance of laws of va- 

 riation, ii. 490 

 ■ — — pangenesis, ii. 291 



■ regrowth of supernumerary 



digits in man, ii. 477 



■ retreat of sea during earth- 



quakes, 11. 151 



■ reversion of ' feral ' pigs to 



the wild type, ii. 304 



seeds attached to birds' feet, ii. 

 326 



seeds conveyed in locust dung. 



ii. 420 



ii. 391 



ii. 303 



415 



seeds uninjured by salt w^ater, 



sheep herding apart, ii. 311 

 tameness of Gralapagos birds, 



unconscious selection, ii. 288 



S'ariation,'ii. 285, 289, 291, 297 

 wading birds of Gahipagos, ii. 



Darwin and Wallace's essays on spe- 

 cies, ii. 278 



Dates in geology, how far determinable 

 by variations of excentricity, i. 295 



Daubeny, Dr., on Vesuvius, i. 630 



volcanos, i. 592 ; ii. 53 

 springs, i. 395, 397 

 gases in mnd volcanos, ii. 76 

 hydrogen and nitrogen in vol- 





canic eruptions, ii. 224, 226 

 Davis, Mr., on Chinese deluge, 10 

 Davy, Dr., on Graham Island, ii. 6 3 

 helmet taken from sea nea^ 



Corfu, ii. 550 



Davy, Eev. C, on vessel engulfed at 

 Lisbon, ii. 148 



Davy, Sir H., on formation of travertin 

 i. 404 



progressive development, 

 1. 146 



— lake of the Solfatara, i. 404 

 his analysis of peat, ii. 496 

 on mctaUie bases, ii. 232 



salt deposited by volca- 

 nos, ii. 224, 226 



the races of man, ii. 465 

 Dawson, Dr., on American Devonian 

 flora, i. 149, 230 



submerged forest of Bay of 



Fundy, ii. 532 



Dead Sea, level of, i. 112 

 Dease and Simpson on strata com- 

 pressed by ice, i. 382 

 De Beaumont. See Beaumont 



De CandoUe, Alphonse, on provinces of 

 plants, ii. 384 



Aug., on botanical regions, ii. 382 



dispersion of plants by 



man, ii. 397, 399 



extinction of species, ii. 435 



on hybrid species, ii. 325 



on longevity of trees, ii. 45 



South American useful plants, 



ii. 287 

 Decken, Baron Von Der, on snow-capped 



mountain on the equator, i. 248 

 De la Beche, Sir H., on delta of Ehone, 

 i. 417 



submarine forest, -i. 543 



subsidence of Port Koyal, 

 ii. 161 



Delta of the Amazons, i. 466 



Ganges and Brahmapootra, i. 



471 _ ^ 



Mississippi Kiver, antiquity of, 



i. 457, 461 

 Nile, i. 431 



Po and Adige, 423 

 marine, of the Khone, i. 427 



— of Ganges and Indus, alternate fresh- 

 water and marine beds in the, ii. 570 



Deltas, age of existing, i. 485 

 convergence of, 484 

 formed by tides, i. 440 

 grouping of strata in, i. 486 

 in lakes, i. 416, 421 

 mud, how deposited in, i. 309 



— concluding remarks on, i. 484 



De Luc, his treatise on Geology, i. 82, 84 



on conversion of forests into peat- 

 mosses, ii. 500 

 Deluge, fossil shells referred to, i. 31, 35 

 Deluges, supposed causes of, i. 110 

 traditions of, i. 593 

 in Chili, ii. 154 



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