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Abkriast groups, 373.
of organlo beings, 358.
on groups of species suddenly ap-
on embryological succession, 205.
on tho glacial period, 310.
on embryological characters, 364.
on the embryos of vertebrates, 382.
on parallelism of embryological de-
boulders and glaciers of, 325.
South, no modern formations on
Animals, not domesticated from being
with thicker fur in cold climates, 122.
Antarctic islands, ancient flora of, 347.
Ants attending aphides. 188.
slave-making instinct, 195.
Artichoke, Jerusalem, 129
Audubon on habits of frigate-bird, 160
on variation in birds'-nests, 189.
on heron eating seeds, 338.
dogs of, 192.
extinct animals of, 296.
European plants in, 327.
Babington, Mr., on British plants, 49.
Balancoment of growth, 133.
Bamboo with hooks, 176.
Barberry, flowers of, 92.
Barrande, M., on Silurian colonies, 274.
on the succession of species, 2S4.
on parallelism of palaeozoic forma
on affinities of ancient species, 288.
distribution of, 343.
queen, killing rivals, 180.
hive, not sucking tho red clover
hive- cell-making Instinct, 200.
humble, colls of, 200.
with deficient tarsi, 123.
on ciassification, 365.
annually cross the Atlantic, 317.
colour of, on continents, 121.
fossil, in caves of Brazil, 296
Birds of Madeira, Bermuda, and Gala
with traces of embryonic teeth, 301.
affinities of, 373.
on striped Hemlonus, 147.
on croused geese, 224.
Brent, Mr., on house-tumblers, 101.
on hawks killing pigeons, 315.
Cabbage, varieties of, crossed, 03.
Canary-birds. sterility of hybrids, 223.
Capo do Verde islands. 347.
Cape of Good Hope, plants of, 102, 326.
Carrler-plgeoos killed by hawks, 315.
Cassinl on flowers of composite;, 131.
Cats, with blue eyes, deaf, 18.
variation in habits of, 86.
curling tail when going to spring, 170.
destroyed by flies in La Plata, 70.
breeds of, locally extinct, 103.
fertility of Indian and European
Cotacea, teeth and hair, 131.
sexual, variable, 141.
adaptive or analogical, 371.
Chthamalus, cretacean species of, Mo.
to natural selection, 05.
carapace aborted, 134.
their ovigerous frona, 172.
larvae of, 883.
Clift, Mr., on the succession of types, 206
Collections, palsMntological, poor, 252.
in relation to attacks by flies, 177.
male flowers of, 392.
to fertility, 235.
Coral-islands, seeds drifted to, 315.
reefs, indicating move merits of earth,
Correlation of growth in domestic produc-
Creation, single centres of, 307.
advantages of, 01.
unfavourable to selection, 00.
on fossil monkeys, 265.
Fred., on instinct, ISO.
Dana, Prof., on blind cnve-anlmals, 126.
on relations of c
on crustaceans of New Zealand, 327.
on umbelllfcra, 132.
on general affinities, 374.
Alph, on low plants, widely dis-
on widely-ranging plants being va-
on naturalisation, 107.
on winged seeds, 133.
on Alpine species suddenly beeom
on distribution of plants with large
on vegetation of Australia, 830.
on fresh-water plants, 336.
on insular plants, 330.
of oldest rocks, 269.
during glacial period, 318.
means of, 311.
descended from several wild stocks,
domestic instincts of, 100.
proportions of, when young, 380.
Drones killed by other bees, 180.
Earl, Mr. W., on the Malay Archipelago,
Ears, drooping, in domestic animals, 17.
Economy of organisation, 134.
fossil species of, 206.
on gradations of structure, 173.
on embryologies! characters, 364.
of glacial period, 128.
conditions of, 184.
as bearing on natural selection, 102.
of domestic varieties, 103.
correction for aberration, 180.
Fabro, M., on parasitic sphex, 195.
on fossil crocodile, 274.
on elephants and mastodons, 292,
I Fertility of hybrids, 221.
from slight changes in conditions,
of crossed varieties, 236.
pollen of, 181.
teieostean, sudden appearance of, 267
eating seeds, 337.
fresh-water, distribution of, 335.
electric organs of, 172.
ganoid, living in fresh water, 281.
of southern hemisphere, 827.
of compoeitse and umbellifersB, 131.
on abrupt range of shells in depth,
on poorness of palaxmtological col-
on continuous succession of genera,
on continental extensions, 311.
on parallelism in time and spnco,356.
flava, neuter of, 212.
Fries on species in large genera being
in United States, 81.
varieties of, acelimatised in United
Galapagos Archipelago, birds of, Mo.
productions of, 347, 348.
Game, increase of, checked by vermin, W.
on reciprocal crosses, 228.
on crossed maize and verbascum,
on comparison of hybrids and mon
on homologous organs, 378.
Isidore, on variability of repeated
on correlation in monstrosities, 18.
Geoffrey on correlation, 131
on variable parts being often mon-
imperfection of the record, 245.
Mr., on colours of birds, 121.
on birds of the Galapagos, 347.
on distribution of genera of birds,
Gourds, crossed, 238.
on naturalised plants in the United
on Alpine plants, 318.
Groups, aberrant, 373,
red, a doubtful species, 50.
correlation of, in domestic products,
correlation of, 130.
Habit, effect of, under domestication, 17.
effect of, under nature, 122.
diversified, of same species, 164.
Ilartung, M., on boulders in the Azores,
Hearne on habits of bears, 165.
Heath, changes in vegetation, 70.
Heer, O., on plants of Madeira, 100.
Helix pomatia, 346.
Hemionus, striped, 147.
Herbert, W.,on struggle for existence, 61.
on sterility of hybrids, 220.
t) v certain plants, 16.
Himalaya, glaciers of, 324.
Hooker, Dr., on acelimatisation of ]
lavan trees, 127.
on Australian plants, 327, 347.
on flora of the Antarctic land?, 341,
on the plants of tho Galapagos, 541,
Hooks on bamboos, 176.
to seeds on islands, 342.
proportions of, when young, 386.
P., on reason blended with instinct,
on habitual nature of instincts, 186.
on slave-making ants, 195.
on Melipona domestica, 200.
Hutton, Captain, on crossed geese, 224.
on embryologies! succession, 295.
on homologous organs, 381.
on the development of aphis, 334.
Icebergs transporting seeds, 316.
Individuals, numbers favourable to selec-
many, whether simultaneously cre-
at corresponding ages, 20,82.
sea-side, colours of, 121.
blind, in caves, 126.
Japan, productions of, 324.
Juwsiou on classification, 363.
Kentucky, caves of, 125.
on sterility of hybrids, 218.
on reciprocal crosses, 228.
on crossed varieties of nicotiana, 239.
on crossing male and hermaphrodite
Lamarck on adaptive characters, 371.
of Madeira, naturalised, 350.
Laurel, nectar secreted by the leaves, 88.
Laws of variation, 120.
Leech, varieties of, 73.
Lcguminosae, nectar secreted by glands, 88.
Lepidosircn. 100, 288.
Life, struggle for, 60.
Lingula, Silurian, 268.
Linnaeus, aphorism of, 360.
Lion, mane of, 84.
young of, striped, 382.
on resemblance of child to parent,
Lund and Clausen on fossils of Brazil, 296.
on modern changes of the earth, 90.
on the imperfection of the geological
North America, 282.
on transport of seeds by Icebergs,
on great alternations of climate, 332.
Nova Scotia, 259.
Macleay on analogical characters, 371 .
beetles of, wingless, 124.
Madeira, fossil land-shol.s of, 296.
birds of. 340.
Malay Archipelago compared with Eu-
mammals of, 344.
fossil species of, 296.
Matthiola, reciprocal crosses of, 228.
acelimatisation of, 128.
Mocklng-thrush of the Galapagos, 350.
Mongrels, fertility and sterility of, 236.
and hybrids compared, 239.
Mons, Van, on the origin of fruit-trees, 32.
Moquin-Tandon on seaside plants, 121.
Mozart, musical powers of, 186.
Mud, seeds In. 337. %
Mules, striped, 148.
M&ller, Dr. F., on Alpine Australian
on azoic formations, 268.
on extinction, 277.
Nails, rudimentary, 393.
Natural history, future progress of, 419.
In New Zealand, 180.