On the Origin of the Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page v
... Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principles of Selection anciently fol- lowed , their ...
... Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principles of Selection anciently fol- lowed , their ...
Page viii
... varieties when crossed and of their mongrel offspring not uni- versal — Hybrids and mongrels compared independently ... varieties at the present day - On the nature of extinct intermediate varieties ; on their number- On the lapse of ...
... varieties when crossed and of their mongrel offspring not uni- versal — Hybrids and mongrels compared independently ... varieties at the present day - On the nature of extinct intermediate varieties ; on their number- On the lapse of ...
Page xii
... varieties when crossed , in contrast with species , corrected . Infertility of varieties of Verbascum when crossed . On subaerial denudation . On the rate of subaerial denudation , as measured by years , and on the probable rate of ...
... varieties when crossed , in contrast with species , corrected . Infertility of varieties of Verbascum when crossed . On subaerial denudation . On the rate of subaerial denudation , as measured by years , and on the probable rate of ...
Page xvii
... varieties of man- kind , fitted for the country which they inhabit . Of the accidental varieties of man , which would occur among the first few and scat- tered inhabitants of the middle regions of Africa , some one would be better ...
... varieties of man- kind , fitted for the country which they inhabit . Of the accidental varieties of man , which would occur among the first few and scat- tered inhabitants of the middle regions of Africa , some one would be better ...
Page xviii
... varieties once , and many varieties are gradually becoming species by assuming constant and peculiar characters : " but farther on ( p . 18 ) he adds , " except the original types or ancestors of the genus . " In 1843-44 Professor ...
... varieties once , and many varieties are gradually becoming species by assuming constant and peculiar characters : " but farther on ( p . 18 ) he adds , " except the original types or ancestors of the genus . " In 1843-44 Professor ...
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Common terms and phrases
accumulated adapted admit affinities allied species America analogous ancient appear archipelago Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common continuous crossed crustaceans degree developed difficulty distinct species divergence doubt eggs embryo existing exterminated extinct extremely facts favourable females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological Glacial period gradations greater number groups of species habits Hence hermaphrodites hive-bee hybrids important individuals inhabitants inherited insects instance instincts intercrossing larvæ less living males mammals manner migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation parent perfect pigeons pistil pollen present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary organs seeds sexual sexual selection Silurian slight South America stamens sterility structure struggle successive suppose theory tion variability variations vary whilst whole