Life on the Earth: Its Origin and SuccessionMacmillan and Company, 1860 - 224 من الصفحات |
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الصفحة 25
... prevalent structures and qualities - to place them in such relations to each other as they really have to represent , in short , the plan of these parts of creation - according to the leading ideas of which it is , or seems to us to be ...
... prevalent structures and qualities - to place them in such relations to each other as they really have to represent , in short , the plan of these parts of creation - according to the leading ideas of which it is , or seems to us to be ...
الصفحة 31
... prevalent in another division . Though each great type seems to have in a general sense one main destiny marked out for it by structure , place of residence , and habits , yet each of the three higher types ( Mollusca , Articulata ...
... prevalent in another division . Though each great type seems to have in a general sense one main destiny marked out for it by structure , place of residence , and habits , yet each of the three higher types ( Mollusca , Articulata ...
الصفحة 41
... prevalent idea of climbing and holding on by opposable fingers which appear among the Reptilia in Chameleon , among the Birds in the Parrot and Woodpecker , and among the Mammalia in the whole race of the Quadrumana . Perhaps the ...
... prevalent idea of climbing and holding on by opposable fingers which appear among the Reptilia in Chameleon , among the Birds in the Parrot and Woodpecker , and among the Mammalia in the whole race of the Quadrumana . Perhaps the ...
الصفحة 58
... prevalent in the sea , and of others as abundant in the more ancient strata . In each case the relative abundance of species is intended to be shewn by the numerals corresponding to each period . I confine the illustra- tions to the ...
... prevalent in the sea , and of others as abundant in the more ancient strata . In each case the relative abundance of species is intended to be shewn by the numerals corresponding to each period . I confine the illustra- tions to the ...
الصفحة 64
... prevalent fauna begins at a minimum , rises to a maximum , and dies away to a final minimum , to be followed by an- other system having similar phases . The most remark- able and prevalent of these surfaces or zones of least life are ...
... prevalent fauna begins at a minimum , rises to a maximum , and dies away to a final minimum , to be followed by an- other system having similar phases . The most remark- able and prevalent of these surfaces or zones of least life are ...
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عبارات ومصطلحات مألوفة
abundance affinity Ammonites Amorphozoa ancient Annelida antiquity appear atmosphere beds Belemnites Brachiopoda British Cænozoic Strata Carbon Carboniferous Cephalopoda Cetacea Chalk character classes climate Coal creation Cretaceous Crocodilia Crustacea deposits Dimyaria distribution earlier earliest earth Echinodermata effect Eocene epoch equal examples existing favourable Fishes forms fossil freshwater Gasteropoda genera genus geological geological periods globe Goniatites groups heat hypothesis Ichthyosaurus Insects Invertebrata land Lias limestone limited Lingula living Llandeilo Lower Palæozoic Strata Mammalia marine mean temperature Mesozoic Mesozoic Period Mesozoic Strata modern Oceans Mollusca Monomyaria naturalists nature number of species occur Oolitic organic origin Palæozoic ages perhaps Permian phenomena plants and animals Pleiocene Polyzoa prevalent races radiation recent regard remarkable represented Reptiles rivers rocks sediments shale shells shew Silurian Stonesfield structure succession suppose surface Teleosaurus Terebratula thickness tion traced Uniformitarian Upper variations variety vegetable Vertebrata whole zone Zoophyta دو دو دو
مقاطع مشهورة
الصفحة 202 - As all the living forms of life are the lineal descendants of those which lived long before the Cambrian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world.
الصفحة 203 - 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.
الصفحة 202 - Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth, have descended from some one primordial form, into which life was first breathed.
الصفحة 201 - I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species. Furthermore, I am convinced that Natural Selection has been the main, but not exclusive, means of modification.
الصفحة 201 - I cannot doubt that the theory of descent with modification embraces all the members of the same great class or kingdom. I believe that animals are descended from at most only four or five progenitors, and plants from an equal or lesser number.
الصفحة 203 - It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth...
الصفحة 202 - Nevertheless all living things have much in common, in their chemical composition, their cellular structure, their laws of growth, and their liability to injurious influences.
الصفحة 186 - The intermixture of distinct species is guarded against by the aversion of the individuals composing them to sexual union, or by the sterility of the mule offspring. It does not appear that true hybrid races have ever been perpetuated for several generations, even by the assistance of man; for the cases usually cited relate to the crossing of mules with individuals of pure species, and not to the intermixture of hybrid with hybrid.
الصفحة 203 - Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely the production of the higher animals, directly follows. There is grandeur in this view of life...
الصفحة 200 - I can entertain no doubt, after the most deliberate study and dispassionate judgment of which I am capable, that the view which most naturalists until recently entertained, and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable...