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Animals, blind, in caves, 110.
extinct, of Australia, 310.

Anomma, 232.

Antarctic islands, ancient flora of,
355.

Antechinus, 373.

Ants attending aphides, 207.

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slave-making instinct, 217.

-, neuters, structure of, 230.
Apes, not having acquired intellectual
powers, 181.

Aphides, attended by ants, 207.
Aphis, development of, 390.
Apteryx, 140.
Arab horses, 26.

Aralo-Caspian Sea, 311.
Archeopteryx, 284.

Archiac, M. de, on the succession of
species, 299.

Artichoke, Jerusalem, 114.
Ascension, plants of, 347.
Asclepias, pollen of, 151.
Asparagus, 325.

Aspicarpa, 367.

Asses, striped, 127.

improved by selection, 30.

Ateuchus, 109.

Aucapitaine, on land-shells, 353.
Audubon, on habits of frigate-bird,

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Bizcacha, 318.

affinities of, 379.

Bladder for swimming, in fish, 147.
Blindness of cave animals, 110.
Blyth, Mr., on distinctness of Indian
cattle, 14.

on striped hemionus, 128.
on crossed geese, 240.
Borrow, Mr., on the Spanish pointer,
26.

Bory St. Vincent, on Batrachians, 350.
Bosquet, M., on fossil Chthamalus,
284.

Boulders, erratic, on the Azores, 328.
Branchiæ, 148, 149.

of crustaceans, 152.

Braun, Prof., on the seeds of Fuma-
riaceæ, 174.

Brent, Mr., on house-tumblers, 210.
Britain, mammals of, 352.

Broca, Prof., on Natural Selection,
170.

Bronn, Prof., on duration of specific
forms, 275.

various objections by, 170.
Brown, Robert, on classification, 366.
Sequard, on inherited mutila-
tions, 108.

Busk, Mr., on the Polyzoa, 193.
Butterflies, mimetic, 375, 376.
Buzareingues, on sterility of varieties,
258.

C.

Cabbage, varieties of, crossed, 78.
Calceolaria, 239.

Canary-birds, sterility of hybrids,
240.

Cape de Verde islands, productions of,
354.

plants of, on mountains, 337.
Cape of Good Hope, plants of, 101,
347.

Carpenter, Dr., on foraminifera, 308.
Carthamus, 173.

Catasetum, 155, 372.

Cats, with blue eyes, deaf, 9.

variation in habits of, 209.
curling tail when going to
spring, 162.

Cattle destroying fir-trees, 56.

56.

destroyed by flies in Paraguay,

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Columba livia, parent of domestic
pigeons, 17.
Colymbetes, 345.

Compensation of growth, 117.
Compositæ, flowers and seeds of, 116.
outer and inner florets of, 173.
male flowers of, 398.
Conclusion, general, 421.

Conditions, slight changes in, favour-
able to fertility, 251.
Convergence of genera, 100.
Coot, 142.

Cope, Prof., on the acceleration or
retardation of the period of repro-
duction, 149.

Coral-islands, seeds drifted to, 326.
reefs, indicating movements of
earth, 326.
Corn-crake, 143.

Correlated variation in domestic pro-
ductions, 9.

Coryanthes, 154.

Creation, single centres of, 320.
Crinum, 238.

Croll, Mr., on subaerial denudation,
267, 269.

on the age of our oldest form-
ations, 286.

on alternate Glacial periods in
the North and South, 336.

Crosses, reciprocal, 244.

Crossing of domestic animals, import-
ance in altering breeds, 15.
advantages of, 76, 77.

unfavourable to selection, 80.
Crüger, Dr., on Coryanthes, 154.
Crustacea of New Zealand, 338.
Crustacean, blind, 110.

air-breathers, 152.
Crustaceans, their chelæ, 193.
Cryptocerus, 231.
Ctenomys, blind, 110.

Cuckoo, instinct of, 205, 212.
Cunningham, Mr., on the flight of
the logger-headed duck, 108.
Currants, grafts of, 246.
Currents of sea, rate of, 325.
Cuvier, on conditions of existence, 205.

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land, 338.

Dawson, Dr., on eozoon, 287.

De Candolle, Aug. Pyr., on struggle
for existence, 49.

on umbelliferæ, 116.

on general affinities, 379.

De Candolle, Alph., on the variability
of oaks, 40.

on low plants, widely dispersed,
359.

on widely-ranging plants being
variable, 43.

on naturalisation, 89.
on winged seeds, 117.

on Alpine species suddenly be-
coming rare, 135.

on distribution of plants with
large seeds, 326.

on vegetation of Australia, 340.
-, on fresh-water plants, 345.
on insular plants, 347.
Degradation of rocks, 266.
Denudation, rate of, 268.

of oldest rocks, 287.

of granitic areas, 274.
Development of ancient forms, 307.
Devonian system, 305.

Dianthus, fertility of crosses, 243.
Dimorphism in plants, 35, 252.
Dirt on feet of birds, 328.
Dispersal, means of, 323.

during Glacial period, 330.
Distribution, geographical, 316.
means of, 323.

Disuse, effects of, under nature, 108.
Divergence of character, 86.
Diversification of means for same
general purpose, 153.

Division, physiological, of labour, 89.
Dog, resemblance of jaw to that of
the Thylacinus, 374.

Dogs, hairless, with imperfect teeth, 9.
descended from several wild
stocks, 15.

domestic instincts of, 210.

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Earl, Mr. W., on the Malay Archipe-
lago, 351.
Ears, drooping, in domestic animals, 8.
rudimentary, 400.

Earth, seeds in roots of trees, 326.
charged with seeds, 328.
Echinodermata, their pedicellariæ,
191.
Eciton, 230.

Economy of organisation, 117.
Edentata, teeth and hair, 115.

fossil species of, 417.

Edwards, Milne, on physiological
division of labour, 89.

on gradations of structure, 156.
on embryological characters,
368.

Eggs, young birds escaping from, 68.
Egypt, productions of, not modified.

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