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adapted admit affinity allied species ancient animals appear Archipelago areas become believe birds breeds Cambrian changes characters classiﬁcation climate closely allied conﬁned continent crustaceans degree deposited difficulty distant distinct species domestic embryo Europe existing extinct fact faunas fertilised fertility ﬁnd ﬁrst crosses ﬁsh ﬁshes ﬁtted ﬂoated ﬂower formations formerly forms fossil fresh-water Gartner genera genus geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvae less living mammals manner marine Marsupials migration modiﬁcation modiﬁed descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation palaeontologists palaeozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America speciﬁc stage stamens sterility structure successive suppose terrestrial tertiary theory variations varieties whilst whole widely different
Page 305 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Page 277 - That many breeds produced by man have to a large extent the character of natural species, is shown by the inextricable doubts whether many of them are varieties or aboriginally distinct species. There is no reason why the principles which have acted so efficiently under domestication should not have acted under nature.
Page 296 - I by no means expect to convince experienced naturalists whose minds are stocked with a multitude of facts all viewed, during a long course of years, from a point of view directly opposite to mine. ... [B]ut I look with confidence to the future, — to young and rising naturalists, who will be able to view both sides of the question with impartiality.
Page 293 - This has been effected chiefly through the. natural selection of numerous successive, slight, favourable variations; aided in an important manner by the inherited effects of the use and disuse of parts ; and in an* unimportant manner, that is in relation to adaptive structures, whether past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously.
Page 302 - ... will no doubt become simpler when we have a definite object in view. We possess no pedigrees or armorial bearings ; and we have to discover and trace the many diverging lines of descent in our natural genealogies, by characters of any kind which have long been inherited.
Page 299 - I believe that animals have descended from at most only four or five progenitors, and plants from an equal or lesser number. " 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 281 - ... increasing in size, for the world would not hold them, the more dominant groups beat the less dominant. This tendency in the large groups to go on increasing in size and diverging in character, together with the...
Page 304 - In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.
Page 233 - Nothing can be more hopeless than to attempt to explain this similarity of pattern in members of the same class, by utility or by the doctrine of final causes. The hopelessness of the attempt has been expressly admitted by Owen in his most interesting work on the