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 24
... plates of sea - lilies ( Crinoids ) . Similarly , other limestones are composed almost entirely of the skeletons of corals ; and such old coralline limestones can readily be paralleled by formations which we can find in actual course of ...
... plates of sea - lilies ( Crinoids ) . Similarly , other limestones are composed almost entirely of the skeletons of corals ; and such old coralline limestones can readily be paralleled by formations which we can find in actual course of ...
Página 86
... plate attached to the inferior side of the head - shield in front . There is no reason to doubt that the animal possessed legs ; but these structures seem to have resembled those of many living Crustaceans in being quite soft and ...
... plate attached to the inferior side of the head - shield in front . There is no reason to doubt that the animal possessed legs ; but these structures seem to have resembled those of many living Crustaceans in being quite soft and ...
Página 99
... plates , closely fitting together , and arranged in peculiar intersecting curves , presenting very much the appearance of the engine - turned case of a watch . Passing next to the sub - kingdom of Calenterate animals ( Zoophytes ...
... plates , closely fitting together , and arranged in peculiar intersecting curves , presenting very much the appearance of the engine - turned case of a watch . Passing next to the sub - kingdom of Calenterate animals ( Zoophytes ...
Página 103
... plates ( the " septa " ) , which spring from the inside of the wall of the cup , and of which some generally reach the centre . Compound corals , again ( fig . 44 ) , consist of a greater or less number of structures similar in ...
... plates ( the " septa " ) , which spring from the inside of the wall of the cup , and of which some generally reach the centre . Compound corals , again ( fig . 44 ) , consist of a greater or less number of structures similar in ...
Página 104
... plates of the coral ( " septa " ) arranged in multiples of six or five ; whereas the former have these structures arranged in multiples of four , and often showing a cross - like disposition . For this reason , the common Lower Silurian ...
... plates of the coral ( " septa " ) arranged in multiples of six or five ; whereas the former have these structures arranged in multiples of four , and often showing a cross - like disposition . For this reason , the common Lower Silurian ...
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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...