Bees, hive, cell-making instinct, 224.
, humble, cells of, 225.
, parasitic, 218.
Beetles, wingless, in Madeira, 135.
with deficient tarsi, 135.
Bentham, Mr., on British plants, 48.
, on classification, 419.
Berkeley, Mr., on seeds in salt-water,
358.
Bermuda, birds of, 391.
Birds acquiring fear, 212.
annually cross the Atlantic, 364.
, colour of, on continents, 132.
, footsteps and remains of, in se-
condary rocks, 304.
, fossil, in caves of Brazil, 339.
— of Madeira, Bermuda, and Gala-
pagos, 391.
, song of males, 89.
— transporting seeds, 361.
, waders, 385.
—, wingless, 134, 182.
—, with traces of embryonic teeth,
450.
Bizcacha, 349.
, affinities of, 429.
Bladder for swimming in fish, 190.
Blindness of cave animals, 137.
Blyth, Mr., on distinctness of Indian
cattle, 18.
, on striped Hemionus, 163.
, on crossed geese, 254.
Boar, shoulder-pad of 88.
Borrow, Mr., on the Spanish pointer,
35.
Bory St. Vincent on Batrachians,
393.
Bosquet, M., on fossil Chthamalus,
305.
Boulders, erratic, on the Azores, 363.
Branchiae, 190.
Brent, Mr., on house-tumblers, 214.
, on hawks killing pigeons, 362.
Brewer, Dr., on American cuckoo,
217.
Britain, mammals of 396.
Bronn on duration of specific forms,
2.94.
Brown, Robert, on classification, 415.
Buckman on variation in plants, 10.
Buzareingues on sterility of varieties,
270.

Cabbage, varieties of, crossed, 99.
Calceolaria, 251.
Canary-birds, sterility of hybrids, 252.
Cape de Verde islands, 398.
Cape of Good Hope, plants of 110,
375.
Carrier-pigeons killed by hawks, 362.
Cassini on flowers of compositae, 145.
Catasetum, 424.
Cats, with blue eyes, deaf, 12.
—, variation in habits of 91.
—- curling tail when going to spring,
201.
Cattle destroying fir-trees, 72.
— destroyed by flies in La Plata,
72

—, breeds of, locally extinct, 111.
, fertility of Indian and European
breeds, 254.
Cave, inhabitants of, blind, 137.
Centres of creation, 352.
Cephalopodae, development of, 442.
Cervulus, 253.
Cetacea, teeth and hair, 144.
Ceylon, plants of 375.
Chalk formation, 322.
Characters, divergence of 111.
, sexual, variable, 156.
, adaptive or analogical, 426.
Charlock, 76.
Checks to increase, 67.
—, mutual, 71.
Chickens, instinctive tameness of, 216.
Chthamalinae, 289.
Chthamalus, cretacean species of 305.
Circumstances favourable to selection of
domestic products, 40.
to natural selection, 102.
Cirripedes capable of crossing, 101.
, carapace aborted, 148.
—, their ovigerous frena, 192.
, fossil, 304.
—, larvae of 440.
Classification, 413.
Clift, Mr., on the succession of types,
339.
Climate, effects of, in checking increase
of beings, 68.
, adaptation of, to organisms, 139.

Cobites, intestine of, 190.
Cockroach, 76,
Collections, palaeontological, poor, 288.
Colour, influenced by climate, 132.
—, in relation to attacks by flies,
198.
Columba livia, parent of domestic pi-
geons, 23.
Colymbetes, 386.
Compensation of growth, 147.
Compositae, outer and inner florets of,
144.
, male flowers of, 451.
Conclusion, general, 480.
Conditions, slight changes in, favour-
able to fertility, 267.
Coot, 185.
Coral-islands, seeds drifted to, 361.
reefs, indicating movements of
earth, 310.
Corn-crake, 186.
Correlation of growth in domestic pro-
ductions, 11.
of growth, 143, 198.
Cowslip, 49.
Creation, single centres of 352.
Crinum, 250.
Crosses, reciprocal, 258.
Crossing of domestic animals, import-
ance in altering breeds, 20.
, advantages of 96.
unfavourable to selection, 102.
Crustacea of New Zealand, 376.
Crustacean, blind, 137.
Cryptocerus, 239.
Ctenomys, blind, 137.
Cuckoo, instinct of 216.
Currants, grafts of 262.
Currents of sea, rate of 360.
Cuvier on conditions of existence,
206.
on fossil monkeys, 304.
—, Fred., on instinct, 208.

D.

Dana, Prof., on blind cave-animals,
139.
, on relations of crustaceans of
Japan, 372.
on crustaceans of New Zealand,
376.

Earl, Mr. W., on the Malay Archipe-
lago, 395.

Ears, drooping, in domestic animals,
11.

, rudimentary, 454.
Earth, seeds in roots of trees, 361.
Eciton, 238.
Economy of organization, 147.
Edentata, teeth and hair, 144.
, fossil species of 339.
Edwards, Milne, on physiological divi-
sions of labour, 115.
, on gradations of structure, 194.
—, on embryological characters,
4.18
Eggs, young birds escaping from, 87.
Electric organs, 192.
Elephant, rate of increase, 64.
of glacial period, 141.
Embryology, 438.
Existence, struggle for, 60.
, conditions of 206.
Extinction, as bearing on natural selec-
tion, 109.
of domestic varieties, 111.
, 317.
Eye, structure of 187.
, correction for aberration, 202.
Eyes reduced in moles, 137.

Habit, effect of, under domestication,
11.
, effect of, under nature, 134.
, diversified, of same species, 183.
Hair and teeth, correlated, 144.
Harcourt, Mr. E. W., 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, 0., on plants of Madeira, 107.
Helix pomatia, 397.
Helosciadium, 359.
Hemionus, striped, 163.
Herbert, W., on struggle for exist-
ence, 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 375.
Hippeastrum, 250.
Holly-trees, sexes of 93.
Hollyhock, varieties of, crossed, 271.
Hooker, Dr., on trees of New Zealand,
100.

HOOKER.

Hooker, Dr., on acclimatisation of
Himalayan trees, 140.
, on flowers of umbelliferae, 145.
, on glaciers of Himalaya, 373.
, on algae of New Zealand, 376.
, on vegetation at the base of the
Himalaya, 378.
, on plants of Tierra del Fuego,
374, 378.
, on Australian plants, 375, 399.
, on relations of flora of South
America, 379.
, on flora of the Antarctic lands,
381, 399.
on the plants of the Galapagos,
392, 398.
Hooks on bamboos, 197.
to seeds on islands, 392.
Horner, Mr., on the antiquity of Egyp-
tians, 18.
Horns, rudimentary, 454.
Horse, fossil, in La Plata, 318.
Horses destroyed by flies in La Plata,
72.