Fuci, crossed, 258.
Fur, thicker in cold climates, 133.
Furze, 439.
G.
Galapagos Archipelago, birds of, 390.
, productions of, 398, 400.
Galeopithecus, 181.
Game, increase of, checked by vermin, 68.
Gärtner on sterility of hybrids, 247, 255.
on reciprocal crosses, 258.
on crossed maize and verbascum, 270.
on comparison of hybrids and mongrels, 272.
Geese, fertility when crossed, 253.
, upland, 185.
Genealogy important in classification, 425.
Geoffroy St. Hilaire on balancement, 147.
on homologous organs, 434.
, Isidore, on variability of repeated parts, 149.
, on correlation in monstrosities, 11.
, on correlation, 144.
, on variable parts being often monstrous, 155.
Geographical distribution, 346.
Geography, ancient, 487.
Geology, future progress of, 487.
, imperfection of the record, 279.
Giraffe, tail of, 195.
Glacial period, 365.
Gmelin on distribution, 365.
Gnathodon, fossil, 368.
Godwin-Austen, Mr., on the Malay Archipelago, 299.
Goethe on compensation of growth, 147.
Gooseberry, grafts of, 262.
Gould, Dr. A ., on land-shells, 397.
, Mr., on colours of birds, 132.
, on birds of the Galapagos, 398.
, on distribution of genera of birds, 404.
Gourds, crossed, 270.
Grafts, capacity of, 261.
Grasses, varieties of, 113.
Gray, Dr. Asa, on trees of United States, 100.
, on naturalised plants in the United States, 115.
, on rarity of intermediate varieties, 176.
, on Alpine plants, 365.
, Dr. J. E., on striped mule, 165.
Grebe, 185.
Groups, aberrant, 429.
Grouse, colours of, 84.
, red, a doubtful species, 49.
Growth, compensation of, 147.
, correlation of, in domestic products, 11.
, correlation of, 143.
H.
Habit, effect of, under domestication, 11.
, effect of, under nature, 134.
, diversified, of same species, 183.
Hair and teeth, correlated, 144.
Harcourt, Mr. E. V., on the birds of Madeira, 391.
Hartung, M., on boulders in the Azores, 363.
Hazel-nuts, 359.
Hearne on habits of bears, 184.
Heath, changes in vegetation, 72.
Heer, O., on plants of Madeira, 107.
Helix pomatia, 397.
Helosciadium, 359.
Hemionus, striped, 163.
Herbert, W., on struggle for existence, 62.
, on sterility of hybrids, 249.
Hermaphrodites crossing, 96.
Heron eating seed, 387.
Heron, Sir R., on peacocks, 89.
Heusinger on white animals not poisoned by certain plants, 12.
Hewitt, Mr., on sterility of first crosses, 264.
Himalaya, glaciers of, 373.
, plants of, 373.
Hippeastrum, 250.
Holly-trees, sexes of, 93.
Hollyhock, varieties of, crossed, 271.
Hooker, Dr., on trees of New Zealand, 100.
