The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 17
... reasons which have led me to this belief are in some degree applicable in other cases , I will here briefly give them . If the several breeds are not varieties , and have not proceeded from the rock - pigeon , they must have descended ...
... reasons which have led me to this belief are in some degree applicable in other cases , I will here briefly give them . If the several breeds are not varieties , and have not proceeded from the rock - pigeon , they must have descended ...
Page 19
... reasons , namely , —the improbability of man having formerly made seven or eight supposed species of pigeons to breed freely under domestication ; - these supposed species being C 2 I mongrels crossed gave wine rocke we.
... reasons , namely , —the improbability of man having formerly made seven or eight supposed species of pigeons to breed freely under domestication ; - these supposed species being C 2 I mongrels crossed gave wine rocke we.
Page 20
... reasons , taken together , we may safely conclude that all our domestic breeds are descended from the rock - pigeon or Columba livia with its geogra- phical sub - species . In favour of this view , I may add , firstly , that the wild C ...
... reasons , taken together , we may safely conclude that all our domestic breeds are descended from the rock - pigeon or Columba livia with its geogra- phical sub - species . In favour of this view , I may add , firstly , that the wild C ...
Page 25
... reason to believe that King Charles's spaniel has been un- consciously modified to a large extent since the time of that monarch . Some highly competent authorities are convinced that the setter is directly derived from the spaniel ...
... reason to believe that King Charles's spaniel has been un- consciously modified to a large extent since the time of that monarch . Some highly competent authorities are convinced that the setter is directly derived from the spaniel ...
Page 36
... reason to believe that many of these doubtful and closely allied forms have permanently retained their characters for a long time ; for as long , as far as we know , as have good and true species . Practically , when a naturalist can ...
... reason to believe that many of these doubtful and closely allied forms have permanently retained their characters for a long time ; for as long , as far as we know , as have good and true species . Practically , when a naturalist can ...
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Common terms and phrases
adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continuous crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formations formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important increase 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 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 theory tion variability variations varieties vary whilst whole wings young
Popular passages
Page 1 - These facts, as will be seen in the latter chapters of this volume, seemed to throw some light on the origin of species — that mystery of mysteries, as it has been called by one of our greatest philosophers.
Page 162 - ... if it could be proved that any part of the structure of any one species had been formed for the exclusive good of another species, it would annihilate my theory, for such could not have been produced through natural selection
Page 1 - ... of our greatest philosophers. On my return home, it occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it. After five years' work I allowed myself to speculate on the subject, and drew up some short notes...
Page 424 - Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide.
Page 50 - In these several senses, which pass into each other, I use for convenience' sake the general term of Struggle for Existence.
Page 322 - Every species has come into existence coincident both in space and time with a pre-existing closely allied species.
Page 146 - If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.
Page 310 - I strongly insisted, in 1839 and 1845, on this " law of the succession of types,"—on " this wonderful relationship in the same continent between the dead and the living." Professor Owen has subsequently extended the same generalisation to the mammals of the Old World. We see the same law in this author's restorations of the extinct and gigantic birds of New Zealand. We see it also in the birds of the caves of Brazil. Mr. Woodward has shown that the same law holds good with sea-shells, but, from...
Page 57 - Now the number of. mice is largely dependent, as every one knows, on the number of cats; and Col.
Page 103 - It is a truly wonderful fact—the wonder of which we are apt to overlook from familiarity—that all animals and all plants throughout all time and space should be related to each other in groups subordinate to groups, in the manner which we everywhere behold...