Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
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Page 123
... organic forms ; while in the temperate regions , there have been a series of periodical checks and extinctions of a more or less disastrous nature , necessitating the commencement of the work of development in certain lines over and ...
... organic forms ; while in the temperate regions , there have been a series of periodical checks and extinctions of a more or less disastrous nature , necessitating the commencement of the work of development in certain lines over and ...
Page 143
... organic life , the majority of the species would be in a state of stable equilibrium ; the most favourable variations would have been long ago selected ; and the numbers of individuals in each species would be tolerably constant , being ...
... organic life , the majority of the species would be in a state of stable equilibrium ; the most favourable variations would have been long ago selected ; and the numbers of individuals in each species would be tolerably constant , being ...
Page 144
... organic forms . ' The change of colour in the female , not being urged on by such intense vital activity as in the case of the male , would be much slower , and , owing probably to inherited tendencies , in a different direction . The ...
... organic forms . ' The change of colour in the female , not being urged on by such intense vital activity as in the case of the male , would be much slower , and , owing probably to inherited tendencies , in a different direction . The ...
Page 158
... Organic World - Theory of Heat and Light as producing Colour - Changes of Colour in Animals produced by Coloured Light - Classification of Organic Colours - Protective Colours -Warning Colours - Sexual Colours - Typical Colours - The ...
... Organic World - Theory of Heat and Light as producing Colour - Changes of Colour in Animals produced by Coloured Light - Classification of Organic Colours - Protective Colours -Warning Colours - Sexual Colours - Typical Colours - The ...
Page 161
... organic world thus leads us to the conclusion that colour is by no means so unim- portant or inconstant a character as at first sight it appears to be ; and the more we examine it the more convinced we shall become that it must serve ...
... organic world thus leads us to the conclusion that colour is by no means so unim- portant or inconstant a character as at first sight it appears to be ; and the more we examine it the more convinced we shall become that it must serve ...
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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