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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.

342.

Ligurian, i. 117.

various objections by, i. 265.
hive, cell-making instinct, i. Brown, Robert, on classification, ii.

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207.

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Catasetum, i. 243; ii. 216.
Cats, with blue eyes, deaf, i. 13.
variation in habits of, i. 325.
curling tail when going to
spring, i. 254.

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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.

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ii. 58.

Colour, influenced by climate, i. 165.
in relation to attack by flies,
i. 248.

Columba livia, parent of domestic
pigeons, i. 26.

Cephalopoda, structures of eyes, i. Colymbetes, ii. 174.

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

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

Chthamalinæ, ii. 59.

Compensation of growth, i. 182.
Composite, flowers and seeds of, i.

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male flowers of, ii. 257.

Conclusion, general, ii. 293.

Conditions, slight changes in, fa-
vourable to fertility, ii. 27.
Convergence of genera, i. 156.
Coot, i. 222.

Cope, Prof., on the acceleration or
retardation of the period of repro-
duction, i. 232.

Coral-islands, seeds drifted to, ii.
145.

- 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.

Chthamalus, cretacean species of, Crinum, ii. 6.
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.

Claparède, Prof., on the hair-clasp-
ers of the Acaridæ, i. 239.
Clarke, Rev. W. B., on old glaciers
in Australia, ii. 159.
Classification, ii. 202.

Clift, Mr., on the succession of types,
ii. 121.

Climate, effects of, in checking in-
crease of beings, 84.

—, adaptation of, to organisms, i.
174.

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.

Cruger, 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.

Cunningham, Mr., on the flight of
the logger-headed duck, i. 167.
Currants, grafts of, ii. 19.
Currents of sea, rate of, ii. 144.
Cuvier, on conditions of existence,
i. 320.

Cuvier, on fossil monkeys, ii. 79.
-, Fred., on instinet, i. 320.
Cyclostoma, resisting salt water, ii.
187.

D.

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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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.

Fabro, 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.

"" from slight changes in condi-
tions, ii 28.

of crossed varieties, ii. 34.
Fir-trees destroyed by cattle, i. 88.
, pollen of, i. 257.

Fish, flying, i. 218.

teleostean, sudden appearance
of, ii. 81.

eating seeds, ii. 146, 175.
fresh-water, distribution of,

ii. 172.

Fishes, ganoid, now confined to
fresh water, i. 130.

electric organs of, i. 234.

, ganoid, living in fresh water,
ii. 99.

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in United States, i. 104.

Glacial period, affecting the North
and South, ii. 158.

Glands, mammary, i. 295.

Ginelin, on distribution, ii. 151.

varieties of, acclimatised in Godwin-Austen, Mr., on the Malay

United States, i. 176.

Fuci, crossed, ii. 15, 23.

Fur, thicker in cold climates, i. 166.
Furze, ii. 241.

G.

Galapagos Archipelago, birds of,
ii. 179.

productions of, ii. 188, 190.
Galaxias, its wide range, ii. 172.
Galeopithecus, i. 217.

Game, increase of, checked by ver-
min, i. 86.

Gärtner, on sterility of hybrids, ii.
3, 4, 11.

on reciprocal crosses, ii. 15.

-, on crossed maize and verbas-
ii. 37.
cum,

-, on comparison of hybrids and
mongrels, ii. 40, 41, 42.
Gaudry, Prof., on intermediate ge-
nera of fossil mammals in Attica,
ii. 107.

Geese, fertility when crossed, ii. 9,

10.

upland, i. 222.

Geikie, Mr., on subaerial denuda-
tion, ii. 53.

Genealogy, important in classifica-
tion, ii. 212.

Generations, alternate, ii. 239.
Geoffroy St. Hilaire, on balance-
ment, i. 182.

on homologous organs, ii. 233.
Isidore, on variability of re-
peated parts, i. 184.

or correlation, in monstrosi-
ties, i. 13.

on correlation, i. 179.

on variable parts being often
monstrous, i. 190.

Geographical distribution, ii. 129.
Geography, ancient, ii. 303.
Geology, future progress of, ii. 302.
-, imperfection of the record, ii.
303.

Gervais, Prof., on Typotherium, ii.
108.

Giraffe, tail of, i. 245.

structure of, i. 276.

Glacial period, ii. 151.

Archipelago, ii. 74.

Goethe, on compensation of growth,

i. 182.

Gomphia, i. 272.

Gooseberry, grafts of, ii. 19.

Gould, Dr. Aug. A., on land-shells,
ii. 186.

Mr., on colours of birds, i. 165.
-, on instincts of cuckoo, i. 333.
on distribution of genera of
birds, ii. 195.

Gourds, crossed, ii. 38.
Graba, on the Uria lacrymas, i. 113.
Grafting, capacity of, ii. 18, 19, 20.
Granite, areas of denuded, ii. 64.
Grasses, varieties of, i. 137.

Gray, Dr. Asa, on the variability of
oaks, i. 62.

-, on man not causing variabil-
ity, i. 98.

-, on sexes of the holly, i. 116.
-, on trees of the United States,
i. 123.

-, on naturalised plants in the
United States, i. 139.

on æstivation, i. 272.
-, on Alpine plants, ii. 151.

on rarity of intermediate va-
rieties, i. 212.

Dr. J. E., on striped mule, i.
199.
Grebe, i. 221.

Grimm, on asexual reproduction, ii.

240.

Groups, aberrant, ii. 227.
Grouse, colours of, i. 104.

red, a doubtful species, i. 59.
Growth, compensation of, i. 182.
Günther, Dr., on flat-fish, i. 292.
on prehensile tails, i. 295.
on the fishes of Panama, ii.
131.

on the range of fresh-water
fishes, ii. 172.

on the limbs of Lepidosiren,
ii. 258.

H.

Haast, Dr., on glaciers of New Zea-
land, ii. 159.

Habit, effect of, under domestica-
tion, i. 12.

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