The Canadian Naturalist and Geologist, Том 5Dawson., 1860 |
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Стр. 4
... diameter of an inch or more , though usually smaller , and a length of at least three feet . They are irre- gularly dotted with minute linear punctures , the marks probably of ramenta ; and at intervals there are circular areoles with ...
... diameter of an inch or more , though usually smaller , and a length of at least three feet . They are irre- gularly dotted with minute linear punctures , the marks probably of ramenta ; and at intervals there are circular areoles with ...
Стр. 8
... diameter , the areoles are two lines in length and one in breadth , and placed closely together . They are elliptical , acuminate , with central leaf - scar , the form and markings of which could not be perceived . The leaves are thick ...
... diameter , the areoles are two lines in length and one in breadth , and placed closely together . They are elliptical , acuminate , with central leaf - scar , the form and markings of which could not be perceived . The leaves are thick ...
Стр. 9
... of this tree was brought from Gaspé by Sir W. E. Logan , and was shortly described in the ' Proceedings of the American Association ' for 1856 . The specimen is nine inches in diameter , and presents. Devonian Plants . 9.
... of this tree was brought from Gaspé by Sir W. E. Logan , and was shortly described in the ' Proceedings of the American Association ' for 1856 . The specimen is nine inches in diameter , and presents. Devonian Plants . 9.
Стр. 10
... diameter , and eleven inches in its least , the difference being due to compression ; a branch five inches in diameter sprang from its side . On the external surface was a thin layer of crumbling coal , probably representing the bark ...
... diameter , and eleven inches in its least , the difference being due to compression ; a branch five inches in diameter sprang from its side . On the external surface was a thin layer of crumbling coal , probably representing the bark ...
Стр. 25
... , so that when removed from its attachment it appears like a shell split into two equal halves . Its whorls also are more closely united and increase in diameter more rapidly , so that there is a Tubicolous Marine Worms . 25.
... , so that when removed from its attachment it appears like a shell split into two equal halves . Its whorls also are more closely united and increase in diameter more rapidly , so that there is a Tubicolous Marine Worms . 25.
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abundant alæ angle animals aperture appears Arisaig August beak beds Bevin's Lake Boisd Canada Canadian carboniferous cinereous coal collection common convex curved deposits Devonian diameter Dikelocephalus distance distinct Distribution.-New York dorsal Doubleday Eastern Townships elevated end of Lake feet Forewings Fort Vancouver fossils Gaspé Genus geological glabella Gosse Guén half Hamilton's Farm Harris head inches Indian July June Kirby Lake Winnipeg larvæ Lawrence length limestone lines lobes miles Montcalm Montreal mountain Murray Bay Natural History Naturalist nearly neck furrow neck segment North end Nova Scotia obliquely observed Orillia plants posterior pygidium resembles ridge River River Rouge rocks Rouge District rounded sandstone seam seen septa shale shell side Silurian siphuncle slightly Society Sorel species specimens striæ Sugar-bush Lake thickness tion transverse trees umbilicus upper ventral valve Walker whorl width wings woods
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Стр. 458 - THE GLACIERS OF THE ALPS : being a Narrative of Excursions and Ascents. An Account of the Origin and Phenomena of Glaciers, and an Exposition of the Physical Principles to which they are related.
Стр. 119 - Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide. Nevertheless all living things have much in common, in their chemical composition, their germinal vesicles, their cellular structure, and their laws of growth and reproduction. We see this even in so trifling a circumstance as that the same poison often similarly affects plants and animals ; or that the poison secreted by the gall-fly...
Стр. 119 - 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.
Стр. 71 - ... caves have been inhabited by a succession of tenants, and have been selected by man as a place not only of domicile, but of sepulture, while some caves have also served as the channels through which the waters of...
Стр. 118 - It may be asked how far I extend the doctrine of the modification of species. The question is difficult to answer, because the more distinct the forms are which we consider, by so much the arguments in favour of community of descent become fewer in number and less in force. But some arguments of the greatest weight extend very far. All...
Стр. 70 - No subject has lately excited more curiosity and general interest among geologists and the public than the question of the antiquity of the human race ; whether or no we have sufficient evidence to prove the former co-existence of man with certain extinct mammalia, in caves or in the superficial deposits commonly called drift or
Стр. 403 - Without asserting that every part of the theory had been confirmed, he maintained that it was the best explanation of the origin of species which had yet been offered. With regard to the psychological distinction between man and animals; man himself was once a monad — a mere atom, and nobody could say at what moment in the history of his development he became consciously intelligent.
Стр. 74 - ... races and permanent varieties in animals and plants, are the same as those which, in much longer periods, produce species, and, in a still longer series of ages, give rise to differences of generic rank. He appears to me to have succeeded, by his investigations and reasonings...
Стр. 47 - Makrede and one or two others, all belonging either to the genus Bagrus or one nearly allied to it. The first two are quite common in the market and I have seen many specimens of them ; for the last two I have the authority of negro fishermen but have never seen them myself. The eggs in my collection are of three different sizes, indicating so many species ; one of the three having been brought to me without the fish from which they were taken. The eggs become quite large before they leave the ovaries,...
Стр. 181 - ... simply because it was so probable that the operation would be followed by a fatal issue, that I wished to prepare for death and what lies beyond it, whilst my faculties were clear and my emotions were comparatively undisturbed, for I knew well that if the operation were speedily followed by death, I should be in a condition, during the interval, in the last degree unfavourable to making preparation for the great change.