The Ancient Life-history of the Earth: A Comprehensive Outline of the Principles and Leading Facts of Palæontological ScienceD. Appleton & Company, 1878 - 407 páginas |
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Página 12
... shell , as an Oyster , or Mussel , or Cockle , embedded in clay or mud . If the clay were sufficiently soft and fluid , the first thing would be that it would gain access to the interior of the shell , and would completely fill up the ...
... shell , as an Oyster , or Mussel , or Cockle , embedded in clay or mud . If the clay were sufficiently soft and fluid , the first thing would be that it would gain access to the interior of the shell , and would completely fill up the ...
Página 13
... shell is entirely dissolved away , leaving the interior cast loose , like the kernel of a nut , within the case formed by the exterior cast . Or it may happen that subsequent to the attainment of this state of things , the space thus ...
... shell is entirely dissolved away , leaving the interior cast loose , like the kernel of a nut , within the case formed by the exterior cast . Or it may happen that subsequent to the attainment of this state of things , the space thus ...
Página 19
... shell - sand so com- mon on our coasts , and the coral - sand which is so largely formed in the neighbourhood of coral - reefs . In these cases the rock is composed of fragments of the skeletons of shell- fish , and numerous other ...
... shell - sand so com- mon on our coasts , and the coral - sand which is so largely formed in the neighbourhood of coral - reefs . In these cases the rock is composed of fragments of the skeletons of shell- fish , and numerous other ...
Página 21
... shell - fish , crustaceans , sea - urchins , corals , and an immense number of other animals , are enabled to construct their skeletons ; whilst some plants form hard structures within their tissues in a precisely similar manner . We do ...
... shell - fish , crustaceans , sea - urchins , corals , and an immense number of other animals , are enabled to construct their skeletons ; whilst some plants form hard structures within their tissues in a precisely similar manner . We do ...
Página 22
... shells of the minute creatures which will be subsequently spoken of under the name of Foraminifera ( fig . 7 ) , and which , Fig . 7 - Section of Gravesend Chalk , examined by transmitted light and highly magnified . Besides the entire ...
... shells of the minute creatures which will be subsequently spoken of under the name of Foraminifera ( fig . 7 ) , and which , Fig . 7 - Section of Gravesend Chalk , examined by transmitted light and highly magnified . Besides the entire ...
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Términos y frases comunes
abundant allied Amongst ancient animals attain beds belong Birds Bivalves bones bony Brachiopods Britain calcareous Cambrian carbonate Carboniferous Chalk characteristic clays coal Coal-measures composed consists contain Corals Cretaceous Crinoids Crustaceans Cycads deposits Devonian Elephants Eocene Europe existing species extinct genus feet fishes Foraminifera formation forms fossils Ganoids genera genus Geol geological gigantic Glacial Graptolites Greensand horny Journ Jurassic known Lastly Laurentian less Lias lime limestones living Lower Silurian Mammals marine Mesozoic Miocene Mollusca natural North America numerous occur Old Red Sandstone Oolitic organic origin Owen Palæontographical Society Paleozoic period Permian plants plates Pliocene portion possessed Post-Pliocene present day principal Pterosaurs Quadrupeds regarded represented Reptiles resembling Rhinoceros rocks sands shales shell singular siphuncle skeleton skull Slates strata structure surface tail teeth Tertiary thickness tion tooth Trias Triassic Trilobites types Univalves Upper Miocene Upper Silurian vertebræ whilst yielded the remains
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Página 244 - Ichthyosaurus to cut through the waves. May it not therefore be concluded (since, in addition to these circumstances, its respiration must have required frequent access of air), that it swam upon or near the surface, arching back its long neck like a swan, and occasionally darting it down at the fish which happened to float within its reach.
Página 366 - Description of the skeleton of an extinct gigantic sloth, Mylodon robustus, Owen, with observations on the osteology, natural affinities, and probable habits of the megatherioid quadrupeds in general, London, 4to., 176 pp., 24 pis., 1842.
Página 363 - Eagles, owls, and gulls pursue their prey along the sea-coast; ptarmigan run in troops amongst the bushes; little snipes are busy along the brooks, and in the morasses; the social crows seek the neighbourhood of men's habitations ; and, when the sun shines in spring, one may even sometimes hear the cheerful note of the finch, and in autumn, that of the thrush...
Página 291 - ... formation occupies a middle place in the Eocene series, we are struck with the comparatively modern date to which some of the greatest revolutions in the physical geography of Europe, Asia, and northern Africa must be referred. All the mountain chains, such as the Alps, Pyrenees, Carpathians, and Himalayas, into the composition of whose central and loftiest parts the nummulitic strata enter bodily, could have had no existence till after the middle Eocene period."— Manual, p. 232. A still more...