Our Common British Fossils and where to Find Them: A Handbook for StudentsChatto and Windus, 1885 - 331 sider |
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Our Common British Fossils and where to Find Them: A Handbook for Students John Ellor Taylor Uten tilgangsbegrensning - 1885 |
Our Common British Fossils and where to Find Them: A Handbook for Students John Ellor Taylor Uten tilgangsbegrensning - 1885 |
Our Common British Fossils and where to Find Them: A Handbook for Students John Ellor Taylor Uten tilgangsbegrensning - 1885 |
Vanlige uttrykk og setninger
abundance of fossil Agnostus allied Ammonites Ananchytes ancient animals appearance arms Asaphus beautiful beds Belemnites belonging bivalves Brachiopods calcareous called Cambrian Carboniferous limestone Cidarids Clay common commonest coprolite Coralline Crag Crag and recent Cretaceous Crinoids crop crustaceans deposits Devonian Encrinites Eocene extinct Favosites flint foraminifera formation forms fossil fossil corals fossil mollusca fossil sponges fossiliferous frequently Gault genera genus geological student geologist Graptolites Greensand Hill kinds large number latter Lias lime limy living localities London Clay Lower Silurian Ludlow magnified marine modern mollusca naturalists Nautilus nearly neighbourhood nodules Norwich Crag obtained occur Oolitic organized Ostrea Paleozoic peculiar perhaps period places plates plentiful Polyzoa quarries Red Crag regarded resemblance sea-firs sea-mats sea-urchins seen shales shape shells showing Silurian Silurian rocks siphuncle species specimens spicules spines stems stone strata structure surface Trigonia Trilobites tubes univalves Upper Silurian usually valves Wenlock whilst White Chalk worms young geologist zoophytes
Populære avsnitt
Side 186 - The results arising from these facts are not confined to animal physiology ; they give information also regarding the condition of the ancient sea and ancient atmosphere, and the relations of both these media to light, at that remote period when the earliest marine animals were furnished with instruments of vision, in which the minute optical adaptations were the same that impart the perception of light to crustaceans now living at the bottom of the sea. ' With respect to the waters wherein the trilobites...
Side ii - Taylor's (Bayard) Diversions of the Echo Club: Burlesques of Modern Writers. Post 8vo, cl. limp, 2s. Taylor (Dr. JE, FLS), Works by. Crown 8vo, cloth ex., 7s. 6d. each. The Sagacity and Morality of Plants : A Sketch of the Life and Conduct of the Vegetable Kingdom.
Side 185 - ... incomplete on that side only which is directly opposite to the corresponding side of the other eye, and in which, if facets were present, their chief range would be towards each other across the head, where no vision was required. The exterior of each eye, like a circular bastion, ranges nearly round three-fourths of a circle, each commanding so much of the horizon, that where the distinct vision of one eye ceases, that of the other eye begins, so that in the horizontal direction the combined...
Side 185 - In the asaphus caudatus (a species of trilobite) each eye contains at least 400 nearly spherical lenses fixed in separate compartments on the surface of the cornea. The form of the general cornea is peculiarly adapted to the uses of an animal destined to live at the bottom of the water: to look downwards was as much impossible as it was unnecessary to a creature living at the bottom ; but for horizontal vision in every direction the contrivance is complete.
Side 186 - ... have so far affected the rays of light, that a corresponding difference from the eyes of existing crustaceans would have been found in the organs on which the impressions of such rays were then received. Regarding light itself, also, we learn, from the resemblance of these most ancient organisations to existing eyes, that the mutual relations of light to the eye, and of the eye to light, were the same at the time when crustaceans, endowed with the faculty of vision, were first placed at the bottom...
Side 223 - What wonderful changes have been operating during the incalculable number of ages in which the creation and extinction of a large number of genera and thousands of species have taken place! Some few only of the primordial, or first created genera, such as Lingula, Discina, and Crania, have fought their way and struggled for existence through the entire sequence of geo- Fig.
Side 186 - ... regarding the condition of the ancient sea and ancient atmosphere, and the relations of both these media to light, at that remote period when the earliest marine animals were furnished with instruments of vision, in which the minute optical adaptations were the same that impart the perception of light to crustaceans now living at the bottom of the sea. ' With respect to the waters wherein the trilobites maintained their existence throughout the entire period of the transition formation, we conclude...
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Side ii - The Sagacity and Morality of Plants' is a delightful book, as readable as Grant Allen at his best. It contains all the cream of Kerner and Wallace and Mtiller; and, wonderful as is the story which it tells, it asserts nothing for which there is not the guarantee of some careful observer.
Side 233 - The significance or importance of Productus as a Carboniferous genus cannot be overlooked when determining through its species definite horizons in these rocks. It is ubiquitous ; in no region on the globe, where the Carboniferous rocks are developed, do we not find this characteristic shell and in vast abundance — in the Polar regions, Australia, New Zealand, Van Piemen's Land, India, America (in 15 States), throughout Europe, and in Africa.