INDEX 



341 



Dawson, Dr., on eozoon, il. 91 

 De Candolle, Aug. Pyr., on struggle 

 for existence, i. 100 



, on umbelliferae, i. 206 



, on general affinities, ii. 237 



De Candolle, Alph., on the variability 

 of oaks, i. 85 



, on widely- ranging plants being 



variable, i. 89 



-, on naturalization, i. 163 



, on winged seeds, i. 207 



, on Alpine species suddenly be- 

 coming rare, i. 236 



, on distribution of plants with 



large seeds, ii. 153 



, on vegetation of Australia, ii. 



175 



, on fresh-water plants, ii. 183 



, on insular plants, ii. 187 



, on low plants, widely dispersed, 



ii. 205 

 Degradation of rocks, iL 58 

 Denudation, rate of, ii. 60 



of oldest rocks, ii. 91 



of granitic areas, ii. 70 



Development of ancient forms, ii. 123 

 Devonian system, ii. 120-121 

 Dianthus, fertility of crosses, ii. 18 

 Dimorphism in plants, i. 78; ii. 36 

 Dirt on feet of birds, ii. 156 

 Dispersal, means of, ii. 148 

 ■ during Glacial period, ii. 159 

 Distribution, geographical, ii. 137 



, means of, ii. 148 



Disuse, effect of, under nature, i. 193 

 Divergence of character, i. 158 

 Diversification of means for same gen- 

 eral purpose, i. 266 

 Division, physiological, of labor, i. 



164 

 Dog, resemblance of jaw to that of 



the Thylacinus, ii. 229 

 Dogs, hairless, with imperfect teeth, 

 i 37 



Dogs descended from several wild 

 stocks, i. 46 



, domestic instincts of, L 354 



, inherited civilization of, i. 354 



, fertility of breeds together, ii. 16 



, of crosses, ii. 41 



, proportions of body in different 



breeds, when young, ii. 257 



Domestication, variation under, i. 31 



Double flowers, i. 386 



Downing, Mr., on fruit-trees in Amer- 

 ica, i. 127 



Dragon flies, intestines of, i. 255 



Drift-timber, ii. 153 



Driver ant (Anomma), i. 389 



Drones killed by other bees, i. 282 



Duck, domestic, wings of, reduced, i. 

 36 



, beak of, i. 312 



, logger- headed, L 244 



Duckweed, ii. 182 



Dugong, afiQnities of, ii. 215 



Dung-beetles with deficient tarsi, i. 

 194 



Dytiscus, ii. 183 



E 



Eabl, Mr. W., on the Malay Archi- 

 pelago, ii. 194 

 Ears, drooping, in domestic animals, 

 I 36 



, rudimentary, ii. 270 



Eari.h seeds in roots of trees, ii. 183 



charged with seeds, iL 156 



Echinodermata, their pedicellarisB, L 



324 

 Eciton, i. 387 



Economy of organiisation, L 207 

 Edentata, teeth and hair, L 205 



, fossil species of, iL 298 



Edwards, Milne, on physiological divi- 

 sion of labor, L 164 



, on gradations of structure, i. 



270 



