Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
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Page 21
... marked when we compare our midsummer twilight with that of the tropics . Even with us the duration of twilight is very much shorter at the time of the equinoxes , and it is probably not much more than a third shorter than this at the ...
... marked when we compare our midsummer twilight with that of the tropics . Even with us the duration of twilight is very much shorter at the time of the equinoxes , and it is probably not much more than a third shorter than this at the ...
Page 59
... marked out by the different colour of the closed leaflets . The explanation of this pheno- menon , given by botanists , is not very satisfactory ; 1 while the purpose or use of the peculiarity is still more mysterious , seeing that out ...
... marked out by the different colour of the closed leaflets . The explanation of this pheno- menon , given by botanists , is not very satisfactory ; 1 while the purpose or use of the peculiarity is still more mysterious , seeing that out ...
Page 167
... marked effect of colour amid the vast masses of foliage which surround them . An experienced collector in the Eastern tropics once told me , that although a single mountain in Java had produced three hundred species of Orchideæ , only ...
... marked effect of colour amid the vast masses of foliage which surround them . An experienced collector in the Eastern tropics once told me , that although a single mountain in Java had produced three hundred species of Orchideæ , only ...
Page 169
... marked were brighter than usual . Many other cases are known among insects in which the same species acquires a different tint according to its surroundings ; this being particularly marked in some South African locusts , which ...
... marked were brighter than usual . Many other cases are known among insects in which the same species acquires a different tint according to its surroundings ; this being particularly marked in some South African locusts , which ...
Page 194
... marked degree , among mammalia . Whenever there is a difference of colour between the sexes the male is the darker or more strongly marked , and the difference of intensity is most visible during the breeding season ( Descent of Man , p ...
... marked degree , among mammalia . Whenever there is a difference of colour between the sexes the male is the darker or more strongly marked , and the difference of intensity is most visible during the breeding season ( Descent of Man , p ...
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Common terms and phrases
abundant adapted adorned Africa allied Amazon animals ants Asia attract bamboo Batavia beautiful become birds blue brilliant butterflies carnivora causes changes character characteristic climate colour Colours of Animals comparatively conspicuous continent curious Danaidæ Darwin distinct Eocene equator equatorial zone existence extensive fact families fauna favourable feet female ferns fertilization flowers foliage forests fruits genera genus greater green groups habits heat humming-birds hyænas immense inhabit insects Juan Fernandez land larger larvæ leaves lemurs less light Madagascar Malay Archipelago male mammalia marsupials Miocene monkeys natural selection naturalists North northern observed occur ocean ornaments Palearctic parrots peculiar perhaps phenomena plants plumage probably produced proportion protection rays region remarkable resemble sexual selection showy slender sometimes South America species spots structure sun-birds surface tail temperate zones temperature theory tints tion trees tropical trunks Ungulata variation varied variety vegetation whole wings yellow