Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página x
... of important organs - The mam- mary glands - The eyes of flatfish - Origin of the eye - Useless or non - adaptive characters - Recent extension of the region of utility in plants — The same in animals - Uses of tails X CONTENTS.
... of important organs - The mam- mary glands - The eyes of flatfish - Origin of the eye - Useless or non - adaptive characters - Recent extension of the region of utility in plants — The same in animals - Uses of tails X CONTENTS.
Página xi
... tails - Of the horns of deer— Of the scale - ornamentation of reptiles - Instability of non - adaptive characters - Delbœuf's law - No " specific " character proved to be useless - The swamping effects of intercrossing - Isolation as ...
... tails - Of the horns of deer— Of the scale - ornamentation of reptiles - Instability of non - adaptive characters - Delbœuf's law - No " specific " character proved to be useless - The swamping effects of intercrossing - Isolation as ...
Página 1
... TAIL OF BIRDS PAGE 47 48 53 4 . VARIATION OF DOLICHONYX ORYZIVORUS 55 " " 5 . VARIATION OF AGELEUS PHŒNICEUS 56 6 . VARIATION OF CARDINALIS VIRGINIANUS 58 " " 7 . VARIATION OF TARSUS AND TOES 60 8 . VARIATION OF BIRDS IN LEYDEN MUSEUM ...
... TAIL OF BIRDS PAGE 47 48 53 4 . VARIATION OF DOLICHONYX ORYZIVORUS 55 " " 5 . VARIATION OF AGELEUS PHŒNICEUS 56 6 . VARIATION OF CARDINALIS VIRGINIANUS 58 " " 7 . VARIATION OF TARSUS AND TOES 60 8 . VARIATION OF BIRDS IN LEYDEN MUSEUM ...
Página 46
... tail , front and hind legs , colour , and femoral pores , all varying wonder- fully ; and so it is more or less with other species . So ap- parently trifling a character as the scales on the head affording almost the only constant ...
... tail , front and hind legs , colour , and femoral pores , all varying wonder- fully ; and so it is more or less with other species . So ap- parently trifling a character as the scales on the head affording almost the only constant ...
Página 47
... 74 The lengths in the table are given in millimetres , which are here reduced to inches for the means . FIG . 1. - Variations of Lacerta muralis . Lacerta ocellata Lacerta viridis Neck Body Hind Legs Tail Neck. 111 47 DIAGRAM OF VARIATION.
... 74 The lengths in the table are given in millimetres , which are here reduced to inches for the means . FIG . 1. - Variations of Lacerta muralis . Lacerta ocellata Lacerta viridis Neck Body Hind Legs Tail Neck. 111 47 DIAGRAM OF VARIATION.
Outras edições - Ver tudo
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection Alfred Russel Wallace Visualização integral - 1890 |
Palavras e frases frequentes
abundant adapted adduced allied species America amount animals and plants appears birds breed brilliant butterflies cause characters climate closely allied colours of animals common concealment conspicuous continued cross-fertilisation crossed curious Darwin dicotyledons distinct species domestic animals effects eggs enemies Eocene evidence extinct facts faculty favourable female fertile fertilised flowers genera genus geological groups habits hybrids important increase individuals infertility inhabit insects intercrossing kind larva larvæ less living male mammalia mammals markings marsupials mimicry Miocene mode modified moths natural selection naturalists nests occur offspring organs Origin of Species peculiar pigeons Pliocene pollen portion possess probably produced Professor protectively coloured pupa regions remarkable resemblance seeds self-fertilisation Silurian similar specimens spots sterility structure struggle for existence supposed tail theory tints tion toes trees tropical usually variability variation varied varieties vegetation warning colours whole wild wings Zealand