On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volume 2 |
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Page viii
... groups of species- On their sudden appearance in the lowest known fossi..ferous strata — Antiquity of the habitable earth Page 264-289 - CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . - - On their different On the slow ...
... groups of species- On their sudden appearance in the lowest known fossi..ferous strata — Antiquity of the habitable earth Page 264-289 - CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . - - On their different On the slow ...
Page ix
... groups subordinate to groups · - Natural system Rules and difficulties in classification , explained on the theory of descent with modification Classification of varieties - Descent always used in classification - Analogical or adaptive ...
... groups subordinate to groups · - Natural system Rules and difficulties in classification , explained on the theory of descent with modification Classification of varieties - Descent always used in classification - Analogical or adaptive ...
Page xii
... groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . 382 Homological structure of ...
... groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and modified . 382 Homological structure of ...
Page xiv
... groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms ...
... groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms ...
Page 21
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young