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Eye, structure of, 144.

, correction for aberration, 163,

Eyes reduced in moles, 110.

F.

Fabre, M., on hymenoptera fighting,
69.

, on parasitic sphex, 216.

, on Sitaris, 394.

Falconer, Dr., on naturalisation of

plants in India, 51. , on elephants and mastodons,

306.

and Cautley, on mammals of

sub-Himalayan beds, 311.

Falkland Islands, wolf of, 351.

Faults, 268.

Faunas, marine, 317.

Fear, instinctive, in birds, 211.

Feet of birds, young molluscs ad-
hering to, 345.

Fertilisation variously effected, 154,
161.

Fertility of hybrids, 238. , from slight changes in con-
ditions, 252.
Fertility of crossed varieties, 255.
Fir-trees destroyed by cattle, M.

, pollen of, 164.

Fish, flying, 140.

■ , teleostean, sudden appearance

of, 285.

, eating seeds, 327, 346.

, fresh-water, distribution of,

343.

Fishes, ganoid, now confined to fresh

water, 83.

, electric organs of, 150.

, ganoid, living in fresh water,

296.

, of southern hemisphere, 338.

Flat-fish, their structure, 186.
Flight, powers of, how acquired, 140.
Flint-tools, proving antiquity of man,
13.

Flower, Prof., on the Larynx, 190.

, on Halitherium, 302.

, on the resemblance between

the jaws of the dog and Thyla-

cinus, 375. , on the homology of the feet of

certain marsupials, 382.
Flowers, structure of, in relation to

crossing, 73.

Flowers, of composite and umbelli-
ferse, 116, 173.

, beauty of, 161.

, double, 230.

Flyseh formation, destitute of or-
ganic remains, 271.

Forbes, Mr. D., on glacial action in
the Andes, 335.

, E., on colours of shells, 107.

, on abrupt range of shells in

depth, 135.

, on poorness of palseontological

collections, 270.

, on continuous succession ot

genera, 293.

, on continental extensions, 323.

; on distribution during Glacial

period, 330.

, on parallelism in time and

space, 361.

Forests, changes in, in America, 58.

Formation, Devonian, 305.

, Cambrian, 287.

Formations, thickness of, in Britain,
268, 269.

, intermittent, 277.

Formica rufescens, 216.

, sanguinea, 217.

, flava, neuter of, 231.

Forms, lowly organised, long en-
during, 99.

Emma, ovigerous, of cirripedes, 148.

Fresh-water productions, dispersal
of, 343.

Fries, on species in large genera
being closely allied to other species,
45.

Frigate-bird, 142.
Frogs on islands, 350.
Fruit-trees, gradual improvement of,
27.

in United States, 66.

, varieties of, acclimatised iu

United States, 114.
Fuci, crossed, 249, 343.
Fur, thicker in cold climates, 107.
Furze, 388.

6.

Galapagos Archipelago, birds of, 348.

, productions of, 353, 355.

Galaxias, its wide range, 343.
Galeopithecus, 139.

Game, increase of, checked by ver-
min, 55.

Gartner, on stei ility of hybrids, 237,
241.

——, on reciprocal crosses, 243.

——, on crossed maize and verbas-

cum, 257, 258.

, on comparison of hybrids and

mongrels, 259, 260.
Gaudry, Prof., on intermediate genera

of fossil mammals in Attica, 301.
Geese, fertility when crossed, 307.
——, upland, 142.

Geikie, Mr., on subaerial denudation,
267.

Genealogy, important in classifica-

cation, 369.
Generations, alternate, 387.
Geoffroy St. Hilaire, on balancement,

117.

—, on homologous organs, 382.

, Isidore, on variability of re-
peated parts, 118.

, on correlation, in monstrosi-
ties, 9.

, on correlation, 115.

, on variable parts being often

monstrous, 122.

Geographical distribution, 316.

Geography, ancient, 427.

Geology, future progress of, 427.
, imperfection of the record,
427.

Gervais, Prof., on Typotherium, 302.
Giraffe, tail of, 157.

, structure of, 177.

Glacial period, 330.

, affecting the North and South,
335.

Glands, mammary, 189.
Gmelin, on distribution, 330.
Godwin-Austen, Mr., on the Malay

Archipelago, 280.
Goethe, on compensation of growth,

117.
Gomphia, 174.
Gooseberry, grafts of, 246.
Gould, Dr. Aug. A., on land-shells,

353.

, Mr., on colours of birds, 107.

, on instincts of cuckoo, 214.

, on distribution of genera of

birds, 358.
Gourds, crossed, 258. . .

Grabs, on the Uria lacrymans, 72.

Grafting, capacity of, 245, 246.

Granite, areas of denuded, 274.

Grasses, varieties of, 88.

Gray, Dr. Asa, on the variability of
oaks, 40.

, on man not causing varia-
bility, 62.

, on sexes of the holly, 74.

, on trees of the United States,

79.

■ , on naturalised plants in the

United States, 89.

—, on activation, 174.
, on Alpine plants, 330.

, on rarity of intermediate va-
rieties, 136.

, Dr. J. E., on striped mule, 128.

Grebe, 142.

Grimm, on asexual reproduction, 387.
Groups, aberrant, 378.
Grouse, colours of, 66.

, red, a doubtful species, 38.

Growth, compensation of, 117.
Giinther, Dr., on flat-fish, 187.

, on prehensile tails, 189.

, on the fishes of Panama, 317.

■ , on the range of fresh-water

fishes, 343. , on the limbs of Lepidosiren,

399.

E.

Haast, Dr., on glaciers of New Zea-
land, 335.

Habit, effect of, under domestica-
tion, 8.

, effect of, under nature, 108.

, diversified, of same species, 141.

Hackel, Prof., on classification and

the lines of descent, 381.
Hair and teeth, correlated, 115.
Halitherium, 302.

Harcourt, Mr. E. V., on the birds o!

Madeira, 348.
Hartung, M., on boulders in the

Azores, 328.
Hazel-nuts, 325.
Hearne, on habits of bears, 141.
Heath, changes in vegetation, 55.
Heer, Oswald, on ancient cultivated

plants, 13.

, on plants of Madeira, 83.

Helianthemum, 174.

Helix pomatia, 853.
Helmholtz, M., on the imperfection
of the human eye, 163,

Helosciadium, 325.

Hemionus, striped, 128.

Hensen, Dr., on the eyes of Cepha-
lopods, 152.

Herbert, W., on struggle for exist-
ence, 49.

, on sterility of hybrids, 238.

Hector, Dr., on glaciers of New Zea-
land, 335.

Hermaphrodites crossing, 76.

Helix, resisting salt water, 353.

Heron eating seed, 346.

Heron, Sir E., on peacocks, 70.

Heusinger, on white animals poi-
soned by certain plants, 9.

Hewitt, Mr., on sterility of first
crosses, 249.

Hildebrand, Prof., on the self-ste-
rility of Corydalis, 238.

Hilgendorf, on intermediate varie-
ties, 275.

Himalaya, glaciers of, 335.

, plants of, 337.

Hippeastrum, 238.

Hippocampus, 189.

Hofmeister, Prof., on the movements
of plants, 197.

Holly-trees, sexes, of, 73.

Hooker, Dr., on trees of New Zea-
land, 78.

—, on acclimatisation of Hima-
layan frees, 112.

, on flowers of umbelliferse, 116.

, on the position of ovules, 172.

, on glaciers of Himalaya, 335.

, on alga; of New Zealand, 338.

, on vegetation at the base of

the Himalaya, 338.

, on plants of Tierra del Fuego,

336.

, on Australian plants, 337, 355.

, on relations of flora of Ame-
rica, 340.

, on flora of the Antarctic lands.

341, 354.

, on the plants of the Gala-
pagos, 349, 354.

, on glaciers of the Lebanon,

335.

, on man not causing variability,

62.

Hooker, Dr., on plants of mountains

of Fernando Po, 337.
Hooks on palms, 158.

on seeds, on islands, 349.

Hopkins, Mr., on denudation, 274.
Hornbill, remarkable instinct of

234.

Horns, rudimentary, 400.
Horse, fossil, in La Plata, 294.

, proportions of, when young,

392.

Horses destroyed by flies in Para-
guay, 56.

, striped, 128.

Horticulturists, selection applied by,
23.

Huber, on cells of bees, 224.

, P., on reason blended with,

instinct, 205. , on habitual nature of instincts,

206.

, on slave-making ants, 216.'

, on Melipona domestica, 220.

Hudson, Mr., on the Ground-Wood-
pecker of La Plata, 142.

, on the Molothrus, 215.

Humble-bees, cells, of, 221.

Hunter, J., on secondary sexual
characters, 119.

Hutton, Captain, on crossed geese,
240.

Huxley, Prof., on structure of her-
maphrodites, 79.

, on the affinities of the Sirenia,

302.

, on forms connecting birds and

reptiles, 302.

, on homologous organs, 386.

, on the development of aphis,

390.

Hybrids and mongrels compared,

259.
Hybridism, 235.
Hydra, structure of, 147.
Hymenoptera, fighting, 69.
Hymenopterous insect, diving, 142.
Hyoseris, 173.

L

Ibla, 118.

Icebergs transporting seeds, 329.
Increase, rate of, 50.
Individuals, numbers favourable to
selection, 80.

Individuals, many, whether simulta-
neously created, 322.

Inheritance, laws of, 10.

, at corresponding ages, 10, 67.

Insects, colour of, fitted for their
stations, 66.

, sea-side, colours of, 107.

, blind, in caves, 110.

, luminous, 151.

, their resemblance to various

objects, 181.

, neuter, 230.

Instinct, 205.

, not varying simultaneously

with structure, 229.
Instincts, domestic, 209.
Intercrossing, advantages of, 76, 251.
Islands, oceanic, 347.
Isolation favourable to selection, 81.

J.

Japan, productions of, 334.

Java, plants of, 337.

Jones, Mr. J. M., on the birds of
Bermuda, 348.

Jourdain, M., on the eye-spots of
star-fishes, 144.

Jukes, Prof., on subaerial denuda-
tion, 267.

Jussieu, on classification, 367.

K.

Kentucky, caves of, 111.
Kerguelen-land, flora of, 341, 354.
Kidney-bean, acclimatisation of, 114.
Kidneys of birds, 115.
Kirby, on tarsi deficient in beetles,
108.

Knight, Andrew, on cause of varia-
tion, 5.

Kolreuter, on Intercrossing, 76.

, on the barberry, 77.

, on sterility of hybrids, 237.

, on reciprocal crosses, 243.

■ , on crossed varieties of nico-

tiana, 258.

, on crossing male and herma-
phrodite flowers, 397.

L.

Lamarck, on adaptive characters,

373.
Lancelet, 99. , eyes of, 145.

Landois, on the development of the

wings of insects, 148.
Land-shells, distribution of, 353.

, of Madeira, naturalised, 357.

, resisting salt water, 353.

Languages, classification of, 371.
Lankester, Mr. E. Ray, on Longevity,

169.

, on homologies, 385.

Lapse, great, of time, 266.
Larvae, 388, 389.

Laurel, nectar secreted by the leaves,
73.

Laurentian formation, 287.

Laws of variation, 106.

Leech, varieties of, 59.

Leguminosse, nectar secreted by

glands, 73.
Leibnitz' attack on Newton, 421.
Lepidosiren, 83, 303. , limbs in a nascent condition,

398, 399.

Lewes, Mr. G. H., on species not hav-
ing changed in Egypt, 169.

, on the Salamandra atra, 397.

, on many forms of life having

been at first evolved, 425.

Life, struggle for, 49.

Lingula, Silurian, 286.

Linnaeus, aphorism of, 365.

Lion, mane of, 69.

, young of, striped, 388.

Lobelia fulgens, 57, 77.

, sterility of crosses, 238.

Lockwood, Mr., on the ova of the
Hippocampus, 189.

Locusts transporting seeds, 327. *

Logan, Sir W., on Laurentian forma-
tion, 287.

Lowe, Rev. R. J., on locusts visiting
Madeira, 327.

Lowness of structure connected with
variability, 118.

, related to wide distribution,

359.

Lubbock, Sir J., on the nerves of

coccus, 35. , on secondary sexual characters,

124.

on a diving hymenopterous

insect, 142.

, on affinities, 280.

, on metamorphoses, 386, 389.

Lucas, Dr. P., on inheritance, 9.

Lucas, Dr. P., on resemblance of child

to parent, MI.
Lund and Clauseu, on fossils of

Brazil, 310.
Lyell, Sir C, on the struggle for

existence, 49. , on modern changes of the |

earth, 75.- . on terrestial animals not having

been developed on islands, 180. , on a carboniferous land-shell,

271.

, on strata beneath Silurian

system, 287. , on the imperfection of the

geological record, 289. , on the appearance of species,

289.

, on Barrande's colonies, 291.

, on tertiary formations of

Europe and North America, 298.

, on parallelism of tertiary for-
mations, 301.

, on transport of seeds by ice-

oergs, 328.

, on great alternations of cli-
mate, 342.

, on the distribution of fresh-
water shells, 345.

, on land-shells of Madeira,

357.

Lvell and Dawson, on fossilized trees

'in Nova Scotia, 278.
Lythrum salicaria, trimorphic, 254.

II.

Macleay, on analogical characters,

373. • -

Macrauchenia, 302.
M'Donnell, Dr., on electric organs,

150.

Madeira, plants of, 83.

, beetles of, wingless, 109.

, fossil land-shells of, 311.

, birds of, 348.

Magpie tame in Norway, 209.

Males fighting, 69.

Maize, crossed, 257.

Malay Archipelago compared with

Europe, 280.

, mammals of, 352.

Malm, on flat-fish, 186.
Malpighiacese, small imperfect flowers

of, 173.

Malpighiacese, 367.

Mamma?, their development, 189.

, rudimentary, 397.

Mammals, fossil, in secondary for-
mation, 283.

, insular, 351.

Man, origin of, 428.

Manatee, rudimentary nails of, 400.

Marsupials of Australia, 90.

, structure of their feet, 382.

, fossil species of, 310.

Martens, M., experiment on seeds, 325.

Martin, Mr. W. C, on striped mules,
129.

Masters, Dr., on Saponaria, 174.
Matteucci, on the electric organs of

rays, 150.
Matthiola, reciprocal crosses of, 244.
Maurandia, 197.
Means of dispersal, 323.
Mellipona domestica, 220.
Merrell, Dr., on the American cuckoo,

212.

Metamorphism of oldest rocks, 287.
Mice destroying bees, 56.

.n . ,, acclimatisation of, 113.
-TM, tails of, 189.
Miller, Prof., on the cells of bees,

221, 224.
Mirabilis, crosses of, 243.
Missel-thrush, 59.
Mistletoe, complex relations of, 2.
Mivart, Mr., on the relation of hair

and teeth, 115.

, on the eyes of cephalopods,

151.

, various objections to Natural

Selection, 174.

, on abrupt modifications, 201.

, on the resemblance of the

mouse and antechinus, 373.
Mocking-thrush of the Galapagos,

357.

Modification of species not abrupt,
424.

Moles, blind, 110.
Molothrus, habits of, 215.
Mongrels, fertility and sterility of.
255.

and hybrids compared, 259

Monkeys, fossil, 284, 285,
Monachanthus, 372.
Mons, Van, on the origin of fruit
trees, 21.

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