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INDEX.

ABERRANT.

BALANCEMENT.

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South, no modern formations
on west coast, ii. 61.

Ammonites, sudden extinction of,
ii. 99.

Anagallis, sterility of, ii. 4.
Analogy of variations, i. 197.
Ancylus, ii. 174.

Andaman Islands inhabited by a
toad, ii. 182.

Animals, not domesticated from
being variable, i. 19.

domestic, descended from seve-
ral stocks, i. 21.

acclimatisation of, i. 175.

of Australia, i. 140.

with thicker fur in cold cli-

mates, i. 166.

-, blind, in caves, i. 172.

extinct, of Australia, ii. 121.
Anomma, i. 361.

Antarctic islands, ancient flora of,
ii. 190.

Antechinus, ii. 219.

Ants attending aphides, i. 323.

slave-making instinct, i. 336.
neuters, structure of, i. 359.
Apes, not having acquired intel-
lectual powers, i. 282.
Aphides, attended by ants, i. 323.
Aphis, developinent of, ii. 245.
Apteryx, i. 218.
Arab horses, i. 40.
Aralo-Caspian Sea, ii. 121.
Archeopteryx, ii. 80.

Archiac, M. de, on the succession of
species, ii. 103.

Artichoke, Jerusalem, i. 176.
Ascension, plants of, ii. 178.
Asclepias, pollen of, i. 236.
Asparagus, ii. 143.
Aspicarpa, ii. 209.
Asses, striped, i. 198.

-, improved by selection, i. 48.
Ateuchus, i. 168.

Aucapitaine, on land-shells, ii. 187.
Audubon, on habits of frigate-bird,
i. 222.

on variation in birds' nests, i.
324.

on heron eating seeds, ii. 176.
Australia, animals of, i. 140.
dogs of, i. 328.

extinct animals of, ii. 121.
European plants in, ii. 163.
glaciers of, ii. 159.

Azara, on flies destroying cattle, i.

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Bats, how structure acquired, i. Boulders, erratic, on the Azores, ii.

218.

distribution of, ii. 184.

Bear, catching water-insects, i. 220.
Beauty, how acquired, i. 249; ii.
283.

Bee, sting of, i. 255.

-, queen, killing rivals, i. 256.
Australian, extermination of,

i. 93.
Bees fertilising flowers, i. 90.

149.

Branchiæ, i. 231, 232.

of crustaceans, i. 238.
Braun, Prof., on the seeds of Fuma-
riaceæ, i. 271.

Brent, Mr., on house-tumblers, i.
326.

Britain, mammals of, ii. 185.

Broca, Prof., on Natural Selection,
i. 265.

hive, not sucking the red Bronn, Prof., on duration of specific
clover, i. 117.
forms, ii. 66.
various objections by, i. 265.

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Ligurian, i. 117.

342.

hive, cell-making instinct, i. Brown, Robert, on classification, ii.

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Cattle destroying fir-trees, i. 88.
destroyed by flies in Paraguay,
i. 89.

breeds of, locally extinct, i. 134.
fertility of Indian and Euro-
pean breeds, ii. 10.

Indian, i. 21; ii. 10.
Cave, inhabitants of, blind, i. 170.
Cecidomyia, ii. 239.

Celts, proving antiquity of man,
i. 21.

Centres of Creation, ii. 135.
Cephalopoda, structures of eyes, i.
236.

development of, ii. 244.
Cercopithecus, tail of, i. 294.
Ceroxylus laceratus, i. 284.

Cervulus, ii. 9.

Cetacea, teeth and hair, 1. 179.

-, development of the whale-

bone, i. 285.

Cetaceans, i. 285.

Ceylon, plants of, ii. 164.
Chalk formation, ii. 100.
Characters, divergence of, i. 134.

sexual, variable, i. 185, 191.
adaptive or analogical, ii. 218.

Charlock, i. 94.

Checks, to increase, i. 83.

, mutual, i. 86.

Chelæ of Crustaceans, i. 300.
Chickens, instinctive tameness of,
i. 329.

Chironomus, its asexual reproduc-
tion, ii. 240.
Chthamalinæ, ii. 59.

Chthamalus, cretacean species of,
ii. 81.

Circumstances favourable to selec-
tion of domestic products, i. 46.
to natural selection, i. 124.
Cirripedes capable of crossing, i. 124.
-, carapace aborted, i. 184.
their ovigerous frena, i. 232.
fossil, ii. 80.

larvæ of, ii. 243.

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reefs, indicating movements of
earth, ii. 145.

Corn-crake, i. 223.

Correlated variation in domestic
productions, i. 13.

Coryanthes, i. 241.

Creation, single centres of, ii. 135.
Crinum, ii. 6.

Croll, Mr., on subaerial denudation,
ii. 53, 56.

on the age of our oldest for-
mations, ii. 83.

on alternate Glacial periods
in the North and South, ii. 160.
Crosses, reciprocal, ii. 14.

Crossing of domestic animals, im-
portance in altering breeds, i. 23.
advantages of, i. 119, 120.
unfavourable to selection, i.

125.
Crüger, Dr., on Coryanthes, i. 241.
Crustacea of New Zealand, ii. 164.
Crustacean, blind, i. 171.

air-breathers, i. 238.
Crustaceans, their chelæ, i. 300.
Cryptocerus, i. 359.
Ctenomys, blind, i. 170.
Cuckoo, instinct of, i. 319, 330.

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Dana, Prof., on blind cave-animals,
i. 172.

-, on relations of crustaceans of
Japan, ii. 158.

on crustaceans of New Zea-
land, ii. 164.

Dawson, Dr., on eozoon, ii. 85.
De Candolle, Aug. Pyr., on struggle
for existence, i. 77.

on umbelliferæ, i. 181.
-, on general affinities, ii. 228.
Alph., on the variability of
oaks, i. 62.

-, on low plants, widely dis-
persed, ii. 196.

-, on widely-ranging plants be-
ing variable, i. 67.

on naturalisation, i. 139.
on winged seeds, i. 181.
on Alpine species suddenly
becoming rare, i. 210.

-, on distribution of plants with
large seeds, ii. 145.

-, on vegetation of Australia, ii.
167.

on fresh-water plants, ii. 174.
on insular plants. ii. 178.
Degradation of rocks, ii. 52.
Denudation, rate of, ii. 54.

of oldest rocks, ii. 85.
of granitic areas, ii. 64.
Development of ancient forms, ii.
116.

Devonian system, ii. 113.
Dianthus, fertility of crosses, ii. 13.
Dimorphism in plants, i. 55; ii. 29.
Dirt on feet of birds, ii. 148.
Dispersal, means of, ii. 140.

during Glacial period, ii. 151.
Distribution, geographical, ii. 129.
means of, ii. 140.

Disuse, effect of, under nature, i.
167.

Divergence of character, i. 134.

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proportions of body in differ-·
ent breeds, when young, ii. 247.
Domestication, variation under, i. 7.
Double flowers, i. 358.

Downing, Mr., on fruit-trees in
America, i. 104.

Dragon flies, intestines of, i. 229.
Drift-timber, ii. 145.
Driver-ant, i. 361.

Drones killed by other bees, i. 256.
Duck, domestic, wings of, reduced,

12.

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Eggs, young birds escaping from, i.

106.

Egypt, productions of, not modified,
i. 263.

Electric organs, i. 234.
Elephant, rate of increase, i. 80.
of Glacial period, i. 176.
Embryology, ii. 239.
Eozoon Canadense, ii. 84.
Epilepsy inherited, i. 167.
Existence, struggle for, i. 75.
condition of, i. 261.

Extinction, as bearing on natural
selection, i. 150.

of domestic varieties, i. 145.
ii. 94.

Eye, structure of, i. 225.

correction for aberration, i. 255.
Eyes, reduction in moles, i. 170.

F.

Fabre, M., on hymenoptera fight-
ing, i. 108.

on parasitic sphex, i. 336.
on Sitaris, ii. 252.

Falconer, Dr., on naturalisation of
plants in India, i. 80.

on elephants and mastodons,
ii. 113.

and Cautley, on mammals of
sub-Himalayan beds, ii. 122.
Falkland Islands, wolf of, ii. 183.
Faults, ii. 54.

Faunas, marine, ii. 131.

Fear, instinctive, in birds, i. 329.
Feet of birds, young molluscs ad-
hering to, ii. 174.

Fertilisation variously effected, i.
241, 252.

Fertility of hybrids, ii. 6.

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beauty of, i. 252.
double, 358.

Flysch formation, destitute of or-
ganic remains, ii. 59.

Forbes, Mr. D., on glacial action in
the Andes, ii. 160.

-, E., on colours of shells, i. 165.
on abrupt range of shells in
depth, i. 210.

on poorness of paleontological
collections, ii. 58.

-, on continuous succession of
genera, ii. 93.

-, on continental extensions, ii.
140. 141.

on distribution during Glacial
period, ii. 152.

on parallelism in time and
space, ii. 200.

Forests, changes in, in America, i.

91.

Formation, Devonian, ii. 113.

Cambrian, ii. 84.

from slight changes in condi- Formations, thickness of, in Britain,

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