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228.

Dogs, fertility of breeds together, | Falconer, Dr., on naturalisation of

plants in India, 60.
of crosses, 240.

- on fossil crocodile, 281.
- proportions of, when young, - on elephants and mastodons,
399.

300.
Domestication, variation under, 7. - and Cautley on mammals of
Downing, Mr., on fruit-trees in sub-Himalayan beds, 305.
America, 77.

Falkland Island, wolf óf, 853.
Downs, North and South, 256. Faults, 255.
Dragon-flios, intestines of, 171. Faunas marine, 813.
Drift-timber, 324.

Fear, instinctive, in birds, 190.
Driver-ant, 216.

Feet of birds, young molluscs ad.
Drones killed by other bees, 182. hering to, 346.
Duck, domestic, wings of, reduced, Fertility of hybrids, 224.
10.

from slight changes in con.
- logger-headed, 163.

ditions, 239.
Duckweed, 846.

- of crossed varieties, 240.
Dugong, affinities of, 373.

Fir-trees destroyed by cattle, 66.
Dung-beetles with deficient tarsi, - pollen of, 182.
122.

Fish, dying, 164.
Dyticus, 846.

-teleostean, sudden appearance

of, 273.
Earl, Mr. W., on the Malay Archi. - eating seeds, 325, 347.
pelago, 865.

- fresh-water, distribution of,
Ears, drooping, in domestic ani. 344.
mals, 11.

Fishes, ganoid, now. confined to
- rudimentary, 408.

fresh water, 97.
Earth, seeds in roots of trees, 324. electric organs of, 173.
Eciton, 214.

- ganoid, living in fresh water
Economy of organisation, 134. 288.
Edentata, teeth and hair, 181. - of southern hemisphere, 337.
- fossil species of, 305.

Flight, powers of, how acquired,
Edwards, Milne, on physiological 164.
divisions of labour, 105.

Flowers, structure of, in relation
- on gradations of structure, to crossing, 83.
174.

of compositæ and ombel.
- on embryological characters, liferæ, 131.
377.

Forbes, E., on colours of shells,
Eggs, young birds escaping from, 120.
79.

- on abrupt range of shells in
Electric organs, 173.

depth, 157.
Elephant, rate of increase, 60. - on poorness of palæonto-
of glacial period, 128.

logical collections, 258.
Embryology, 894.

- on continuous succession of
Existence, struggle for, 56.

genera, 284.
conditions of, 185.

on continental extensions.
Extinction, as bearing on natural 320.
selection, 99.

-- on distribution during glacial
- of domestic varieties, 101. period, 329.
- 285.

- on parallelism in time and
Eye, structure of, 168.

space, 868.
correction for aberration, 181. Forests, changes in, in America,
Eyes reduced in moles, 124.

69.

Formation, Devonian, 299..
Fabre, M., on parasitic sphes, Formations, thickness of, ip
796

Britain, 254.

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Formations, intermittont, 269. Glacial period, 828.
Formica rufescens, 190.

Gmelin on distribution, 328.
sanguinea, 197.

Gnathodon, fossil, 830.
- flava, neuter of, 215.

Godwin-Austen, Þr., on the Malay
Frena, ovigerous, of cirripedes, Archipelago, 268.
172.

Goethe on compensation of growth,
Fresh-water productions, dispersal 183.
of, 844.

Gooseberry, grafts of, 235.
Fries on species in large genera Gould, Dr. A., on land-shells, 356.

being closely allied to other - Nr., on colours of birds, 120.
species, 52.

- on birds of the Galapagos,
Frigato-bird, 187.

357.
Frogs on islands, 353.

con distribution of genera of
Fruit-trees, gradual improvement birds, 363.

Gourds, crossed, 242.
- in United States, 77. Grafts, capacity of, 234.

- varieties of, acclimatised Grasses, varieties of, 103.
in United States, 129.

Gray, Dr. Asa, on trees of United
Fuci, crossed, 232.

States, 91.
Fur, thicker in cold climates, 121. | - on naturalised plants in tho
Furze, 395.

United States, 104.

- on rarity of intermediate
Galapagos Archipelago, birds of, varieties, 158.
357.

on Alpine plants, 828.
productions of, 358, 360. - Dr. J. E., on striped mule,
Galeopithecus, 163.

149.
Game, increase of, chocked by Grebo, 166.
vermin, 63.

Groups, aberrant, 886.
Gärtner on sterility of hybrids, Grouse, colours of, 77.
221, 222.

red, a doubtful species, 45.
on reciprocal crosses, 232. Growth, compensation of, 133.
- on crossed maize and ver correlation of, in domestic
bascum, 242.

products, 11.
- on comparison of hybrids and correlation of, 129.

mongrels, 244.
Goose, fortility when crossod, 227. Habit, offect of, under domestica-
- upland, 167.

tion, 10.
Genealogy important in classifica- | effect of, under nature, 122.
tion, 378.

- diversified, of same species,
Gooffroy St. Hilaire on balance 165.
ment, 183.

Hair and teeth, correlated, 181.
- on homologous organs, Harcourt, Mr. E. V., on the birds
390.

of Madeira, 851.
- Isidoro, on variability of Hartung, M., on boulders in the
repeated parts, 135.

Azores, 326.
on correlation in mon Hazel-nats, 323.
strosities, 11.

Heame on habits of bears, 165.
on correlation, 180. Heath, changes in vegetation, 66.

on variable parts being Heer, O., on plants of Madeira,
often monstrous, 140.

97.
Geographical distribution, 805. Helix pomatia, 857.
Geography, ancient, 488.

Helosciadium, 828.
Goology, future progress of, 488. I Hemionus, striped, 149.
- imperfection of the record, | Herbert, W., on struggle for exist

ence, 58.
Giraffe, tail of, 175.

- on sterility of hybrids, 224.

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1227.

Hermaphrodites crossing, 87. Hutton, Captain, on crossed geese
Heron eating seed, 348.
Heron, Sir R, on peacocks, 81. Huxley, Prof., on structure of
Heusinger on white animals not hermaphrodites, 91.

poisoned by certain plants, 11. on ombryological succession,
Howitt, Mr.; on sterility of first 303.
crosses, 237.

- on homologous organs, 894.
Himalaya, glaciers of, 335.

- on the development of apbis,
- plants of, 336.

397.
Hippeastrum, 225.

Hybrids and mongrels compared,
Holly-trees, sexes of, 84.

244.
Hollyhock, varieties of, crossed, Hybridism, 220.
243.

Hydra, structure of, 171
Hooker, Dr., on trees of New
Zealand, 91.

Ibla, 134.
on acclimatisation of Hima. Icebergs transporting seeds, 826.
layan trees, 127.

Increase, rate of, 59.
- on flowers of umbelliferæ, Individuals, numbers favourable
131.

to selection, 92.
on glaciers of Himalaya, 835. - many, whether simultans-
- on algæ of New Zealand, 337. L ously created, 319.

on vegetation at the base of Inheritance, laws of, 12.
the Himalaya, 340.

at corresponding ages, 13, 78.
on plants of Tierra del Fuego, Insects, colour of, fitted for habi.
336, 839.

tations, 77.
on Australian plants, 337, - sea-side, colours of, 120.
359.

blind, in caves, 125.
- on relations of flora of South - luminous, 174.
America, 340.

neuter, 212.
on thora of the Antarctic Instinct, 186.
lands, 842, 359.

Instincts, domestic, 193.
on the plants of the Gala | Intercrossing, advantages of, 88
pagos, 352, 357.

Islands, oceanic, 349.
Hooks on bamboos, 177.

Isolation favourable to selection,
to seeds on islands, 352.

95.
Horner, Mr., on the antiquity of
Egyptians, 17.

Japan, productions of, 334.
Horns, rudimentary, 408.

Java, plants of, 836.
Forse, fossil, in La Plata, 286. Jones, Mr. J. M., on the birds of
Horses destroyed by flies in La Bermuda, 351.
Plata, 67.

Jussieu on classification, 375.
striped, 148.
-- proportions of, when young, Kentucky, caves of, 124.
400.

Kerguelen-land, flora of, 842, 358.
Horticulturists, selection applied Kidney - bean, acclimatisation of,
by, 80.

129.
Huber on cells of bees, 207. Kidneys of birds, 130.
- P., on reason blended with Kirby on tarsi deficient in beetles,
instinct, 187.

122.
on habitual nature of in Knight, Andrew, on cause of
stincts, 187.

variation, 7.
- on slave-making ants, 197. Kölreuter on the barberry, 89.

on Melipona domestica, 202. on storility of hybrids, 221.
Humble-bees, cells of, 202.

on reciprocal crosses, 232.
Hunter, J., on secondary sexual - on crossed varieties of nico-
characters, 136.

tiana, 243

Kölrouter, on crossing male and Lyell, Sir C., on transport of seeds
hermaphrodite flowers, 405. by icebergs, 326.

on great alternations of cli.
Lamarck on adaptive characters, mate, 343.
884.

on the distribution of fresh.
Land-shells, distribution of, 856. water shells, 346.
of Madeira, naturalised,

on land-shells of Madeira, 861.
Languages, classification of, 880. Lyell and Dawson on fossilised
Lapse, great, of time, 253.

trees in Nova Scotia, 266.
Larvæ, 395.
Laurel, nectar secreted by the Macleay on analogical characters,
leaves, 83.

884.
Laws of variation, 119.

Madeira, plants of, 97.
Leech, varieties of, 70.

- beetles of, wingless, 128.
Leguminosæ, nectar secreted by fossil land-shells of, 304,
glands, 83.

birds of, 351.
Lepidosiren, 97, 296.

Magpie tame in Norway, 191.
Life, struggle for, 56.

Maize, crossed, 242.
Lingula, silurian, 275.

Malay Archipelago compared with
Linnæus, aphorism of, 872.

Europe, 268.
Lion, mane of, 80.

- mammals of, 855.
young of, stripod, 895. Malpighiaceae, 375.
Lobelia fulgens, 68, 89.

Mammæ, rudimentary, 404.
Lobelia, storility of crosses, 224. | Mammals, fossil, in secondary
Loess of the Rhine, 345.

formation, 272.
Lowness of structure connected insular, 353.
with variability, 185.

| Man, origin of races of, 179.
Lowness, related to wide distribu. Manatee, rudimentary nails of,
tion, 364.

408.
Lubbock, Mr., on the nerves of Marsupials of Australia, 105.
coccus, 42.

fossil species of, 304.
Lucas, Dr. P., on inheritance, 12. Martens, M., experiment on seeds,

on resemblance of child to 323.
parent, 247.

Martin, Mr. W. C., on striped
Lund and Clausen on fossils of mules, 149.
Brazil, 804.

Matteucci, on the electric organs
Lyell, Sir C., on the strugglo for of rays, 173.
existence, 58.

Matthiola, reciprocal crosses of,
on modern changes of the 232.
earth, 86.

Means of dispersal, 320.
on measure of denudation, Melipona domestica, 202.
254.

Metamorphism of oldest rocks,
on a carboniferous land-shell,
259.

Mice destroying bees, 68.
- on strata beneath Silurian - acclimatisation of, 128.

Migration, bears on first appear-
on the imperfection of the ance of fossils, 267.
geological record, 278.

| Miller, Prof., on the cells of bees,
on the appearance of species, | 203.
280.

Mirabilis, crosses' of, 282.
on Barrande's colonies, 281. Missel-thrush. 70. *

on tertiary formations of Mistletoe, complex relations of, 8.
Europe and North America, Mississippi, rato of deposition at
290.

mouth, 255.
od parallelism of tertiary Mocking thrush of the Galapagos,
formations, 294.

í 367.

276.

system: 27 imperfection of the

120.

Modification of species, how far | Noble, Mr., on fertility of Rhodo-
applicable, 435.

dendron, 226.
Moles, blind, 124.

Nodules, phosphatic, in cuoio
Mongrels, fertility and sterility rocks, 276.
of, 240.

and hybrids compared, 244. Oak, varieties of, 47.
Monkeys, fossil, 272.

Onites spelles, 122.
Monocanthus, 382.

Orchis, pollen of, 174.
Mons, Van, on the origin of fruit- Organs of extreme perfection, 167.
trees, 27.

electric, of fishes, 173.
Moquin-Tandon on sea-side plants, of little importance, 175.

- homologous, 390.
Morphology, 390.

- rudiments of, and nascent,
Mozart, musical powers o

404.
Mud, seeds in, 347.

Ornithorhynchus, 97, 375.
Dsules, striped, 149.

Ostrich not capable of flight, 122.
Müller, Dr. F., on Alpine Aus - habit of laying eggs together
tralian plants, 337.

196.
Murchison, Sir R., on the forma. - American, two species of,
tions of Russia, 259.

814.
- on azoic formations, 275. Otter, habits of, how acquired,
- on extinction, 285.

162.
Mustela vison, 161.

Ouzel, water, 166.
Myanthus, 382.

Owen, Prof.,' on birds not flying,
Myrmecocystus, 214.

122.
Myrmica, eyes of, 218.

--on vegetative repetition, 135.

on variable length of arms in
Nails, rudimentary, 408.

ourang-ontang, 136.
Natural history, future progress on the swim-bladder of fishes,
of, 436.

172.
selection, 78.

- on electric organs, 173.
- system, 872.

- on fossil horse of La Plata,
Naturalisation of forms distinct 286.

from the indigenous specios, on relations of ruminants and
104.

pachyderms, 295.
- in New Zealand, 181.

- on fossil birds of New Zea-
Nautilus, Silurian, 275.

land, 804.
Nectar of plants, 83.

- on succession of types, 304.
Nectaries, how formed, 84.

on affinities of the dugong,
Nelum bium luteum, 848.

373.
Nests, variation in, 190.

on homologous organs, 390.
Neuter insects, 212.

_ on the metamorphosis of
Newman, Mr., on humble-bees, 68. cephalopods and spiders, 397."
New Zealand, productions of, not
perfect, 181.

Pacific Ocean, faunas of, 313.
- naturalised products of, 302. | Paley on no organ formed to give
- fossil birds of, 304.

vain, 181.
glacial action in, 335. | Pallas on the fertility of the wild
crustaceans d

stocks of domestic animals, 228
- algæ of, 387.

Paraguay, cattle destroyed by
- number of plants of, 850. flies, 67.
- flora of, 359.

Parasites, 196.
Nicotiana, crossed varieties of, Partridge, dirt on feet, 326.
243.

Parts greatly developed, variable,
- certain species very sterile, 1 186.
231

| degress of utility of 181.

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