INDEX. 
493 
COBITES. 
Cobites, intestine of, 190. 
Cockroach, 76, 
Collections, palaeontological, poor, 288. 
Colour, influenced by clinaate, 132. 
-, in relation to attacks by flies, 
198. 
Columba livia, parent of domestic pi¬ 
geons, 23. 
Colymbetes, 386. 
Compensation of growth, 147. 
Compositae, outer and inner florets of, 
144. 
-, male flowers of, 451. 
Conclusion, general, 480. 
Conditions, slight changes in, favour¬ 
able to fertilit}^, 267. 
Coot, 185. 
Coral-islands, seeds drifted to, 361. i 
■ -reefs, indicating movements of 
earth, 310. 
Corn-crake, 186. 
Correlation of growth in domestic pro¬ 
ductions, 11. 
-of growth, 143, 198. 
Cowslip, 49. 
Creation, single centres of, 352. 
Crinum, 250. 
Crosses, reciprocal, 258. 
Crossing of domestic animals, import¬ 
ance in altering breeds, 20. 
-, advantages of, 96. 
—-unfavourable to selection, 102. 
Crustacea of New Zealand, 376. 
Crustacean, blind, 137. 
Cryptocerus, 239. 
Ctenomys, blind, 137. 
Cuckoo, instinct of, 216. 
Currants, grafts of, 262. 
Currents of sea, rate of, 360. 
Cuvier on conditions of existence, 
206. 
■ -on fossil monkeys, 304. 
-, Fred., on instinct, 208. 
D. 
Dana, Prof., on blind cave-animals, 
139. 
-, on relations of crustaceans of 
Japan, 372. 
■ -, on crustaceans of New Zealand, 
376. 
DUCK. 
De Candolle on struggle for e.xistence, 
62. 
— on umbelliferse, 146. 
-- on general affinities, 430. 
-, Alph., on low plants, widely 
dispersed, 406. 
-,-, on widely-ranging plants 
being variable, 53, 
——,-, on naturalisation, 115. 
-, ——, on winged seeds, 146. 
-,-, on Alpine" species sud¬ 
denly becoming rare, 175. 
——, ——, on distribution of plants 
with large seeds, 360. 
— -,-on vegetation of Australia, 
379. 
——,-, on fresh-water plants, 386. 
-, -, on insular plants, 389. 
Degradation of coast-rocks, 282, . 
Denudation, rate of, 285. 
-of oldest rocks, 308. 
Development of ancient forms, 336. 
Devonian system, 334. 
Dianthus, fertility of crosses, 256. 
Dirt on feet of birds, 362. 
Dispersal, means of, 356. 
-during glacial period, 365. 
Distribution, geographical, 346.^ 
-, means of, 356. 
Disuse, effects of, under nature, 134, 
Divergence of character. 111. 
Division, physiological, of labour, 115. 
Dogs, hairless, with imperfect teeth, 
12. 
— -descended from several wild 
stocks, 18. 
— », domestic instincts of, 213. 
-, inherited civilisation of, 215. 
— -, fertility of breeds together, 254. 
——,-of crosses, 268. 
--, proportions of, when young, 
444. 
Domestication, variation under, 7. 
Downing, Mr., on fruit-trees in Ame¬ 
rica, 85. 
Downs, North and South, 286. 
Dragon-flies, intestines of, 190. 
Drift-timber, 360. 
Driver-ant, 240. 
Drones killed by other bees, 202. 
Duck, domestic, wings of, reduced, 11. 
--, logger-headed, 182, 
