s:
divergence of, 111.
sexual, variable, 156.
adaptive or analogical, 427.

Charlock, 76,

Checks:
to increase, 67.
mutual, 71.

Chickens, instinctive tameness of, 216.

Chthamalinae, 288.

Chthamalus, cretacean species of, 304.

Circumstances favourable:
to selection of domestic products, 40.
to natural selection, 101.

Cirripedes:
capable of crossing, 101.
carapace aborted, 148.
their ovigerous frena, 192.
fossil, 304.
larvae of, 440.

Classification, 413.

Clift, Mr., on the succession of types, 339.

Climate:
effects of, in checking increase of beings, 68.
adaptation of, to organisms, 139.

Cobites, intestine of, 190.

Cockroach, 76.

Collections, palaeontological, poor, 287.

Colour:
influenced by climate, 132.
in relation to attacks by flies, 198.

Columba livia, parent of domestic pigeons, 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, favourable to fertility, 267.

Coot, 185.

Coral:
islands, seeds drifted to, 360.
reefs, indicating movements of earth, 309.

Corn-crake, 185.

Correlation:
of growth in domestic productions, 11.
of growth, 143, 198.

Cowslip, 49.

Creation, single centres of, 352.

Crinum, 250.

Crosses, reciprocal, 258.

Crossing:
of domestic animals, importance in altering breeds, 20.
advantages of, 96.
unfavourable to selection, 102.

Crustacea of New Zealand, 376.

Crustacean, blind, 137.

Cryptocerus, 238.

Ctenomys, blind, 137.

Cuckoo, instinct of, 216.

Currants, grafts of, 262.

Currents of sea, rate of, 359.

Cuvier:
on conditions of existence, 206.
on fossil monkeys, 303.

Cuvier, Fred., on instinct, 208.

Dana, Professor:
on blind cave-animals, 139.
on relations of crustaceans of Japan, 372.
on crustaceans of New Zealand, 376.

De Candolle:
on struggle for existence, 62.
on umbelliferae, 146.
on general affinities, 430.

De Candolle, Alph.:
on low plants, widely dispersed, 406.
on widely-ranging plants being variable, 53.
on naturalisation, 115.
on winged seeds, 146.
on Alpine species suddenly becoming rare, 175.
on distribution of plants