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Frogs on islands, ii. 182.
Fruit-trees, gradual improvement
of, i. 42.

in United States, i. 104.

varieties of, acclimatised in
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-
cum, ii. 37.

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, 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.

Glacial period, affecting the North
and South, ii. 158.
Glands, mammary, i. 295.
Gmelin, on distribution, ii. 151.
Godwin-Austen, Mr., on the Malay
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.

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Habit, effect of, under nature, i. 168.
diversified, of same species,

i. 219.
Häckel, Prof., on classification and
the lines of descent, ii. 231.
Hair and teeth, correlated, i. 179.
Halitherium, ii. 108.

Harcourt, Mr. E. V., on the birds of
Madeira, ii. 180.

Hartung, M., on boulders in the
Azores, ii. 149.
Hazel-nuts, ii. 143.

Hearne, on habits of bears, i. 220.
Heath, changes in vegetation, i.
87.

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

Heer, Oswald, on ancient cultivated
plants, i. 20.

on plants of Madeira, i. 130.
Helianthemum, i. 272.
Helix pomatia, ii. 187.

resisting salt water, ii. 187.
Helmholtz, M., on the imperfection
of the human eye, i. 255.
Helosciadium, ii. 143.
Hemionus, striped, i. 202.
Hensen, Dr., on the eyes of Cepha-
lopods, i. 237.
Herbert, W., on struggle for exist-
ence, i. 77.

-, on sterility of hybrids, ii. 6.
Hermaphrodites crossing, i. 119.
Heron eating seed, ii. 176.
Heron, Sir R., on peacocks, i. 109.
Heusinger, on white animals poi-
soned by certain plants, i. 13.
Hewitt, Mr., on sterility of first
crosses, ii. 23.

Hildebrand, Prof., on the self-ste-
rility of Corydalis, ii. 7.
Hilgendorf, on intermediate varie-
ties, ii. 66.

Himalaya, glaciers of, ii. 159.

plants of, ii. 162.

Hippeastrum, ii. 7.
Hippocampus, i. 295.

Hofmeister, Prof., on the move-
ments of plants, i. 308.
Holly-trees, sexes of, i. 115.
Hooker, Dr., on trees of New Zea-
land, i. 123.

on acclimatisation of Hima-
layan trees, i. 174.

on flowers of umbelliferæ, i.
180.

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on the position of ovules, i. 268.

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Horns, rudimentary, ii. 261.
Horse, fossil, in La Plata, ii. 96.

-, proportions of, when young,
ii. 247.

Horses destroyed by flies in Para-
guay, i. 89.

striped, i. 199.
Horticulturists, selection applied by,
i. 37.

Huber, on cells of bees, i. 349.

P., on reason blended with
instinct, i. 320.

on habitual nature of instincts,
i. 320.

on slave-making ants, i. 336.
on Melipona domestica, i. 343.
Hudson, Mr., on the Ground-Wood-
pecker of La Plata, i. 221.

on the Molothrus, i. 334.
Humble-bees, cells of, i. 343.
Hunter, J., on secondary sexual
characters, i. 185.

Hutton, Captain, on crossed geese,
ii. 10.

Huxley, Prof., on structure of her-
maphrodites, i. 124.

on the affinities of the Sirenia,
ii. 108.

on forms connecting birds and
reptiles, ii. 108.

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at corresponding ages, i. 15,

Insects, colour of, fitted for their
stations, i. 103.

sea-side, colours of, i. 165.
blind, in caves, i. 171.
luminous, i. 236.

their resemblance to certain

objects, i. 283.

neuter, i. 359.

Instinct, i. 319.

not varying simultaneously
with structure, i. 357.

Instincts, domestic, i. 325.

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resisting salt water, ii. 187.
Languages, classification of, ii. 214.
Lankester, Mr. E. Ray, on Longe-
vity, i. 263.

on homologies, ii. 237.
Lapse, great, of time, ii. 51.
Larvæ, ii. 241, 242, 243.

Laurel, nectar secreted by the leaves,
i. 114.

Intercrossing, advantages of, i. 149, Laurentian formation, ii. 84.

ii. 27.

Islands, oceanic, ii. 177.

Laws of variation, i. 164.
Leech, varieties of, i. 93.

Isolation favourable to selection, i. Leguminosa, nectar secreted by

127.

J.

Japan, productions of, ii. 158.
Java, plants of, ii. 162.

Jones, Mr. J. M., on the birds of
Bermuda, ii. 180.

Jourdain, M., on the eye-spots of
star-fishes, i. 225.

Jukes, Prof., on subaerial denuda-
tion, ii. 53.

Jussieu, on classification, ii. 209.

K.

Kentucky, caves of, i. 172.

Kerguelen-land, flora of, ii. 169, 189.

glands, i. 114.

Leibnitz' attack on Newton, ii. 294.
Lepidosiren, i. 130; ii. 109.

limbs in a nascent condition,
ii. 258.

Lewes, Mr. G. H., on species not
having changed in Egypt, i. 263.
-, on the Salamandra atra, ii. 256.

-, on many forms of life having
been at first evolved, ii. 300.
Life, struggle for, i. 77.
Lingula, Silurian, ii. 83.
Linnæus, aphorism of, ii. 205.
Lion, mane of, i. 109.

young of, striped, ii. 241.
Lobelia fulgens, i. 90, 121.

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sterility of crosses, ii. 7.

Lockwood, Mr., on the ova of the
Hippocampus, i. 295.
Locusts transporting seeds, ii. 147.
Logan, Sir W., on Laurentian for-
mation, ii. 84.

Lowe, Rev. R. T., on locusts visiting
Madeira, ii. 147.
Lowness of structure
variability, i. 184.

196.

connected with

related to wide distribution, ii.

Lubbock, Sir J., on the nerves of
coccus, i. 54.

on secondary sexual charac-
ters, i. 193.

on a diving hymenopterous
insect, i. 222.

on affinities, ii. 73.

on metamorphoses, ii. 239, 242.
Lucas, Dr. P., on inheritance, i. 14.
on resemblance of child to
parent, ii. 43.
Lund and Clausen, on fossils of
Brazil, ii. 121.
Lyell, Sir C., on the struggle for
existence, i. 77.

on modern changes of the
earth, i. 118.

on terrestrial animals not hav-
ing been developed on islands, i.

281.

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on Barrande's colonies, ii. 90.
on tertiary formations of
Europe and North America, ii.
101.

on parallelism of tertiary for-
mations, ii. 106.

-, on transport of seeds by ice-
bergs, ii. 148.

on great alterations of climate,
ii. 170.

on the distribution of fresh-
water shells, ii. 174.

on land-shells of Madeira, ii.
193.

Lyell and Dawson, on fossilized trees
in Nova Scotia, ii. 70.
Lythrum salicaria, trimorphic, ii.

32.

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M.

Macleay, on analogical characters,
ii. 218.

Macrauchenia, ii. 107.
M'Donnell, Dr., on electric organs,
i. 234.

Madeira, plants of, i. 130.

beetles of, wingless, i. 169.
fossil land-shells of, ii. 121.
birds of, ii. 180.
Magpie tame in Norway, i. 325.
Males fighting, i. 108.
Maize, crossed, ii. 37.
Malay Archipelago compared with
Europe, ii. 74.

mammals of, ii. 185.
Malm, on flat-fish, i. 291.
Malpighiaceæ, small imperfect flow-
ers of, i. 269.

ii. 209.

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Maurandia, i. 307.

Means of dispersal, ii. 140.
Melipona domestica, i. 343.
Merrell, Dr., on the American
cuckoo, i. 330.

Metamorphism of oldest rocks, ii. 85.
Mice destroying bees, i. 90.

acclimatisation of, i. 175.
tails of, i. 294.

Miller, Prof., on the cells of bees, i.
344, 350.

Mirabilis, crosses of, ii. 15.
Missel-thrush, i. 93.

Mistletoe, complex relations of, i. 3.
Mivart, Mr., on the relation of hair
and teeth, i. 179.

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and hybrids compared, ii. 39.
Monkeys, fossil, ii. 79.

Monachanthus, ii. 216.

Mons, Van, on the origin of fruit-
trees, i. 33.

Monstrosities, i. 51.

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Naturalisation of forms distinct
from the indigenous species, i. 138.
Naturalisation in New Zealand, i.
255.

Moquin-Tandon, on sea-side plants, Naudin, on analogous variations in

i. 166.

Morphology, ii. 231.

Morren, on the leaves of Oxalis, i.
308.

Moths, hybrid, ii. 9.

Mozart, musical powers of, i. 321.
Mud, seeds in, ii. 175.
Mules, striped, i. 201.

Müller, Adolf, on the instincts of the
cuckoo, i. 331.

Müller, Dr. Ferdinand, on Alpine
Australian plants, ii. 163.
Müller, Fritz, on dimorphic crusta-
ceans, i. 55, 362.

on the lancelet, i. 154.

on air-breathing crustaceans,
i. 238.

-, on climbing plants, i. 307.
on the self-sterility of orchids,
ii. 7.

on embryology in relation to
classification, ii. 210.

on the metamorphoses of crus-
taceans, ii. 245, 253.
-, on terrestrial and fresh-water
organisms not undergoing any
metamorphosis, ii. 250.
Multiplication of species not indefi
nite, i. 157.

Murchison, Sir R., on the forma-
tions of Russia, ii. 60.

on azoic formations, ii. 84.

on extinction, ii. 94.

gourds, i. 195.

on hybrid gourds, ii. 38.
on reversion, ii. 4i.

Nautilus, Silurian, ii. 83.
Nectar of plants, i. 114.
Nectaries, how formed, i. 114.
Nelumbium luteum, ii. 176.
Nests, variations in, i. 324, 355, 364.
Neuter insects, i. 359, 360.
Newman, Col., on humble-bees, i. 90.
New Zealand, productions of, not
perfect, i. 255.

naturalised products of, ii. 119.
fossil birds of, ii. 121.
, glaciers of, ii. 159.
crustaceans of, ii. 164.
algæ of, ii. 164.

number of plants of, ii. 178.
flora of, ii. 189.

Newton, Sir I., attacked for irre-
ligion, ii. 294.

Prof., on earth attached to a
partridge's foot, ii. 148.
Nicotiana, crossed varieties of, ii. 39.
certain species very sterile, ii.

14.

Nitsche, Dr., on the Polyzoa, i. 301.
Noble, Mr., on fertility of Rhodo-
dendron, ii. 8.

Nodules, phosphatic, in azoic rocks,
ii. 84.

0.

Murie, Dr., on the modification of Oaks, variability of, i. 62.

the skull in old age, i. 233.

Onites, appelles, i. 168.

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