524 



INDEX. 



Compensation of growtli, 139. 

 Compositae, flowers and seeds of, 



187. 

 • , outer and inner florets of, 



205. 



■ , male flowers of, 469, 



Conclusion, general, 495. 

 Conditions, slight changes in, 



favorable to fertility, 296. 

 Convergence of genera, 120. 

 Coot, 169. 

 Cope, Prof., on the acceleration 



or retardation of the period of 



reproduction, 177. 

 Coral-islands, seeds drifted to, 



385. 

 reefs, indicating movements 



of earth, 385. 

 Corn crake, 170. 

 Correlated variation in domestic 



productions, 10. 

 Coryanthes, 183. 

 Creation, single centers of, 378. 

 Crinum, 281. 



Croll, Mr., on subaerial denuda- 

 tion, 316, 318. 

 , on the age of our oldest for- 

 mations, 338. 

 , on alternate Glacial periods 



in the North and South, 396. 

 Crosses, reciprocal, 287. 

 Crossing of domestic animals, 



importance in altering breeds, 



18. 



, advantages of, 90. 



, unfavorable to selection, 94. 



Criiger, Dr., on Coryanthes, 183. 

 Crustacea of New Zealand, 399. 

 Crustacean, blind, 131. 



air-breathers, 181. 



Crustaceans, their chelae, 228. 

 Cryptocerus, 272. 

 Ctenomys, blind, 130. 

 Cuckoo, instinct of, 242, 250. 

 Cunningham, Mr., on the flight 



of the logger-headed duck, 128. 

 Currants, grafts of, 290. 

 Currents of sea, rate of, 384. 

 Cuvier, on conditions of existence, 



242. 

 — — , Fred. , on instinct, 242. 



Cuvier, on fossil monkeys, 335. 

 Cyclostoma, resisting salt water, 

 *417. 



Dana, Prof., on blind cave-ani- 

 mals, 132. 



, on relations of crustaceans 



of Japan, 395. 



, on crustaceans of New 



Zealand, 399. 



Dawson, Dr., on eozoon, 339. 



De Candolle, Aug. Pyr., on strug- 

 gle for existence, 58. 



, on umbelliferffi, 138. 



, on general aflinities, 447. 



De Candolle, Alph., on the varia- 

 bilitv of oaks, 47. 



, on low plants, widely dis- 

 persed, 423. 



, on widely-ranging plants 



being variable, 50. 



, on naturalization, 105. 



, on winged seeds, 139, 



, on Alpine species suddenly 



becoming rare, 160. 



, on distribution of plants 



with large seeds, 385. 



, on vegetation of Australia, 



401. 



, on fresh-water plants, 407. 



on insular plants, 410.^ 



Degradation of rocks, 315. 

 Denudation, rate of, 316. 



of oldest rocks, 339. 



of granite areas, 324. 



Development of ancient formS; 



363. 

 Devonian system, 361. 

 Dianthus, fertility of crosses, 285 

 Dimorphism in plants, 42, 297. 

 Dirt on feet of birds, 887. 

 Dispersal, means of, 381. 



■ during Glacial period, 389. 



Distribution, geographical, 373. 



, means of, 381. 



Disuse, effect of, under nature, 



128. 

 Diversification of means for same 



general purpose, 182. 

 Division, physiological, of labor^ 



105. 



