Palaeontology Or A Systematic Summary of Extinct Animals and Their Geological RelationsAdam and Charles Black, 1861 - Всего страниц: 463 |
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Стр. 5
... BIRDS , Orders of . MAMMALS Orders of . Cycloid . Ctenoid . } FISHES . BIRDS , by Bones . Procolian Crocodilia . Mosasaurus . Polyptychodon . Iguanodon . Pliosaurus . - Birds and Mammals . Marsupials . Isopoda . Crustacea 10 - poda ...
... BIRDS , Orders of . MAMMALS Orders of . Cycloid . Ctenoid . } FISHES . BIRDS , by Bones . Procolian Crocodilia . Mosasaurus . Polyptychodon . Iguanodon . Pliosaurus . - Birds and Mammals . Marsupials . Isopoda . Crustacea 10 - poda ...
Стр. 178
... - ichnites from the Potsdam Sandstone of Canada , " Quarterly Journal of the Geological Society , 1852 , p . 214 . † Logan , ibid . p . 2 . footprints of birds surpass all others in regard to their 178 PALEONTOLOGY .
... - ichnites from the Potsdam Sandstone of Canada , " Quarterly Journal of the Geological Society , 1852 , p . 214 . † Logan , ibid . p . 2 . footprints of birds surpass all others in regard to their 178 PALEONTOLOGY .
Стр. 179
... birds that course to and fro over the extensive tract of plastic red surface left dry by the far retreat of the tide in the Bay of Fundy . During the period that elapses between one spring tide and the next , the highest part of the ...
... birds that course to and fro over the extensive tract of plastic red surface left dry by the far retreat of the tide in the Bay of Fundy . During the period that elapses between one spring tide and the next , the highest part of the ...
Стр. 180
... birds that course over the flat expanse , and may become hard enough to retain them when the tide returns and deposits in such foot- prints a layer of the fine sand which the rising waters hold in suspension . The best - defined ...
... birds that course over the flat expanse , and may become hard enough to retain them when the tide returns and deposits in such foot- prints a layer of the fine sand which the rising waters hold in suspension . The best - defined ...
Стр. 227
... birds . This curious apparatus of bony plates would aid in protecting the eye - ball from the waves of the sea when the Ichthyosaurus rose to the surface , and from the pressure of the dense element when it dived to great depths ; and ...
... birds . This curious apparatus of bony plates would aid in protecting the eye - ball from the waves of the sea when the Ichthyosaurus rose to the surface , and from the pressure of the dense element when it dived to great depths ; and ...
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Palaeontology: Or A Systematic Summary of Extinct Animals and Their ... Richard Owen Полный просмотр - 1861 |
Palaeontology, Or a Systematic Summary of Extinct Animals and Their ... Richard Owen Полный просмотр - 1860 |
Palaeontology: Or A Systematic Summary of Extinct Animals and Their ... Richard Owen Полный просмотр - 1861 |
Часто встречающиеся слова и выражения
affinities animal arch Archegosaurus articular batrachian beds birds bones bony canine carboniferous cavity chalk characters clay condyle cones convex corals cretaceous crocodiles crocodilian crown Cuvier dental dentition deposits Devonian dorsal eocene evidence existing external extinct feet fishes fore formation fossil ganoid genera genus geological greensand hind Ichthyosaurus Iguanodon impressions inches incisors indicate inner Labyrinthodonts lacertian length lias limbs limestone lizards lobe London clay lower jaw mammalian Mammals marginal maxillary miocene modifications molar nostrils Nothosaurus notochord old red oolitic orbits organic ossification outer pair paleozoic peculiar period Pistosaurus Placodus plates Plesiosaurus pliocene posterior premaxillary premolar present proportions quadrupeds red sandstone remains reptiles resembles ribs ridges rocks saurian shell shew shewn side Silurian siphuncle skeleton skull slender species specimen spines strata structure surface sutures tail teeth tertiary thecodont tooth transverse trias triassic true molars tusks upper jaw valve vertebræ Wealden
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Стр. 442 - But analogy may be a deceitful guide. Nevertheless all living things have much in common, . . . 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."1...
Стр. 324 - ... insure them against perishing by numerous casualties to which quadrupeds are exposed during floods ; and if they chance to be drowned, or to die when swimming on the water, it will scarcely ever happen that they will be submerged so as to become preserved in sedimentary deposits.
Стр. 434 - To give an imaginary example from changes in progress on an island: — let the organization of a canine animal which preyed chiefly on rabbits, but sometimes on hares, become slightly plastic; let these same changes cause the number of rabbits very slowly to decrease, and the number of hares to increase; the effect of this would be that the fox or dog would be driven to try...
Стр. 448 - ... what, I say, have they differed from the artificial instruments which we ourselves plan with foresight and calculation for analogous uses, save in their greater complexity, in their perfection, and in the unity and simplicity of the elements which are modified to constitute these several locomotive organs. Everywhere in organic nature we see the means not only subservient to an end, but that end accomplished by the simplest means.
Стр. 446 - Vertebrata, but the sum of the animal species at each successive geological period has been distinct and peculiar to such period. Not that the extinction of such forms or species was sudden or simultaneous : the evidences so interpreted have been but local : over the wider field of life at any given epoch, the change has been gradual; and, as it would- seem, obedient to some general, but as yet, ill-comprehended law. In regard to animal life, and its assigned work on this planet, there has, however,...
Стр. 446 - Organic remains, traced from their earliest known graves, are succeeded, one series by another, to the present period, and never re-appear when once lost sight of in the ascending search. As well might we expect a living Ichthyosaur in the Pacific, as a fossil whale in the Lias : the rule governs as strongly in the retrospect as the prospect. And not only as respects the Vertebrata, but the sum of the animal species at each successive geological period has been distinct and peculiar to such period.
Стр. 435 - ... of any gradual diminution of the size of such species, but is the result of circumstances, which may be illustrated by the fable of the ' Oak and the Reed ; ' the smaller and feebler animals have bent and accommodated themselves to changes which have destroyed the larger species.
Стр. 440 - ... and human objects, was agglutinated to the roof by the infiltration of water holding lime in solution ; that subsequently, and within the human period, such a great amount of change took place in the physical configuration of the district as to have caused the cave to be washed out and emptied of its contents, excepting the floor breccia, and the patches of material cemented to the roof and since coated with additional stalagmite.
Стр. 305 - In the gavials, (genus gavialis,) the teeth are nearly equal in size, and similar in form, in both jaws, and the first, as well as the fourth tooth in the lower jaw, passes into a groove in the margin of the upper jaw when the mouth is closed.
Стр. 435 - ... the species. If a dry season be gradually prolonged, the large mammal will suffer from the drought sooner than the small one ; if such alteration of climate affect the quantity of vegetable food, the bulky Herbivore will first feel the effects of stinted nourishment ; if new enemies...