INDEX 
483 
Forest-trees, characteristics of, in equa- 
torial forests, 241 
of low growth, 243 
uses of equatorial, 245 
Formica gigas, 279 
Fossils found under old lava beds in 
California, 444 
Frogs and toads, 305 
Frog, with bright colours uneatable, 351 
Fruit-bats, 307 
Fruits of equatorial forest -trees, 245 
attractive colours of, 397 
protective colours of, 398 
greater antiquity of protected than 
attractive, 400 
Galapagos, 8 
colours of productions of, 342 
poor in flowers and insects, 406 
visited by Darwin, 456 
Galton, Mr., on range of intellectual 
power, 191 
Ganocephala, 164 
Gardener, Dr., on a large water Boa, 
305 
Gastropacha querci, protective colour 
and form of, 45 
Gaudry, M., on fossil mammals of 
Greece, 165 
Geckos, 302 
Geiger, on ancient perception of colour, 
413 
Geographical distribution, dependent 
on geologic changes, 3 
its agreement with law of intro- 
duction of new species, 8 
of allied species and groups, 10 
Geological distribution analogous to 
geographical, 11 
Geology, facts proved by, 3, 6 
Geranium pratense, G. pusillum, 404 
Gibbons, 306 
Ginger- worts, 253 
Giraffe, how it acquired its long neck, 
32 
Glacial period, man in America 
during, 439 
Gladstone, Mr., on the colour- sense, 
413 
Glsea, autumnal colours of this genus, 45 
Glow-worm, use of its light, 374 
Goatsuckers remotely allied to owls, 
123 (note) 
Goliath cuckoo, 297 
Gosse, Mr., on J amaica humming-birds, 
318, 321 
on the pugnacity of humming- 
birds, 319 
on food of humming-birds, 321 
Gould, Mr., on sexual plumage of 
gray phalarope, 81 
on incubation by male dotterell, 
81 
on the motions of humming-birds, 
317 
Grallina australis, 133 
Grammatophyllums, 256 
Green birds almost confined to the 
tropics, 38 
Green, why the most agreeable colour, 
412 
Grisebach, on cause of vivid colours of 
arctic flowers, 407 
Guilielma speciosa, 250 
Gums from equatorial forest-trees, 245 
Gunther, Dr., on arboreal snakes, 40 
on colouring of snakes, 73 
Gymnocerus cratosomoides, 67 
G. capucinus, G. dulcissimus, 69 
Gynecia diree, 43 
Habenaria chlorantha, 402 
Habits, often persistent when use of 
them has ceased, 121 
of children and savages analogous 
to those of animals, 121 
if persistent and imitative maybe 
termed hereditary, 121 
of humming-birds, 316 
Hairy covering of Mammalia, use of, 
194 
absence of, in man remarkable, 
195 
the want of it felt by savages, 
195 
could not have been abolished by 
natural selection, 196 
Harpagus diodon, 75 
Heat due to condensation of atmo- 
spheric vapour, 227 
changes colours, 357 
Heiliplus, a hard genus of 'Curculion- 
idse, 67 
Heliconidae, the objects of mimicry, 
55 
2 I 2 
their secretions, 56 
