The Canadian Naturalist and Geologist, Volumen6Dawson., 1861 |
Dentro del libro
Resultados 1-5 de 24
Página 17
... eggs of wild - fowl , for his winter's consump- tion , these he deposits in holes dug in the sand bars of the river , or in beds of moss , and at the expiration of several months , will , when pressed by want , visit his caches . Even ...
... eggs of wild - fowl , for his winter's consump- tion , these he deposits in holes dug in the sand bars of the river , or in beds of moss , and at the expiration of several months , will , when pressed by want , visit his caches . Even ...
Página 23
... eggs , and especially mice , are eaten by the martins ; the otter , and mink eat fish ; but the wolverine delights in carrion . This last is a most destructive beast , but an account of its propensities will be given when I come to ...
... eggs , and especially mice , are eaten by the martins ; the otter , and mink eat fish ; but the wolverine delights in carrion . This last is a most destructive beast , but an account of its propensities will be given when I come to ...
Página 61
... egg is hatched into a minute animalcule or planula of oval form , and with cilia or spontaneously moving threads on its surface . This fixes itself and becomes a scyphis- toma or hydroid polyp of sack - like form , attached by the base ...
... egg is hatched into a minute animalcule or planula of oval form , and with cilia or spontaneously moving threads on its surface . This fixes itself and becomes a scyphis- toma or hydroid polyp of sack - like form , attached by the base ...
Página 62
... eggs destined to form new colonies of Hy- droids . It is here that we perceive the connecting link between the Hydroids and the true Medusa . But another modification of the hydroid structure is found in nature . Let us suppose that we ...
... eggs destined to form new colonies of Hy- droids . It is here that we perceive the connecting link between the Hydroids and the true Medusa . But another modification of the hydroid structure is found in nature . Let us suppose that we ...
Página 255
... eggs of those sea - birds that breed there , and also to ascertain what changes , if any , had taken place in their economy since Audubon's visit , was unfortunately delayed till the 21st of June , so that the results were much less ...
... eggs of those sea - birds that breed there , and also to ascertain what changes , if any , had taken place in their economy since Audubon's visit , was unfortunately delayed till the 21st of June , so that the results were much less ...
Otras ediciones - Ver todas
Términos y frases comunes
Abundant America animal appear Barrande beds birds brown Calciferous Canada Canadensis Canadian Naturalist Carboniferous character coal coast colour common containing crystalline deposits Devonian district eggs elevation Fabr feet formation Fort Simpson fossils Gaspé genera genus geologists gneiss gold graptolites grey hairs Hamilton's Farm Hudson River Huron inches Incisors Indian Island Lake Huron Lake Superior Laurentian limestone lines Linn Logan Lower Canada Lower Silurian mineral molars Montcalm Montreal mountains Natural History Society nearly observed occur Olenus paleozoic petroleum places plants Point Levi Potsdam present probably Prof quartz Quebec Quebec group region remarkable rocks rocky Rouge round sand sandstone second fauna sediments seen shales shells shore side Sir William Logan slates species specimens strata surface Taconic tail thick tion trilobites upper V.S.P. Length valley warblers woods
Pasajes populares
Página 390 - Just previous to this time, in the Report of the Regents of the University of New York, for 1859, Professor Hall had described and figured by the name of Olenus two species of trilobites from the slates of Georgia, Vermont, which Emmons had wrongly referred to the genus Paradoxides. They were at once recognized by Barrande, who called attention to their primordial character, and thus...
Página 95 - ... like those of the Appalachian range. In truth, Mr. Hall observes, the carboniferous limestone is one of the most extensive marine formations of the continent, and is characterized over a much greater area by its marine fauna than by its terrestrial vegetation. " The accumulations of the coal period were the last that gave form and contour to the eastern side of our continent, from the Gulf of St. Lawrence to the Gulf of Mexico ; and as we have shown that the great sedimentary deposits of successive...
Página 197 - ... to furnish important collateral evidence in support of the reasoning founded on other sciences, such as philology and ethnology, which has long demanded, for the development of our race, a number of years far exceeding that which is allowed by the chronology previously received. It is the beautiful expression of Sir Thomas Browne, which I find quoted by Dr Mantell in a former paper on this subject, that " Time conferreth a dignity upon the most trifling thing that resisteth his power...
Página 240 - ... animals ; the latter is not surprising when we consider that a considerable portion of the tissues of the lower marine animals is destitute of nitrogen, and very similar in chemical composition to the woody fibre of plants.
Página 90 - Hall, shown to be the natural base of the Silurian rocks in America, as Barrande and De Verneuil have proved it to be on the continent...
Página 332 - as many as two hundred of these concretions, varying in size from that of a small pea to that of a hazel-nut, to be passed after the administration of a single dose of Podophyllin and the Oil.
Página 93 - Quebec group is of considerable economic interest inasmuch as it is the great metalliferous formation of North America. To it belongs the gold which is found along the Appalachian chain from Canada to Georgia, together with lead, zinc, copper,, silver, cobalt, nickel, chrome and titanium. I have long since called attention to the constant association of the latter metals, particularly chrome and nickel, with the ophiolites and magnesian rocks of this series, while they are wanting in similar rocks...
Página 404 - zone primordiale" of Bohemia — having no representative in the north-western Highlands, there is necessarily a complete unconformity between the fossil-bearing crystalline limestone and quartz-rocks with the Maclurea, Murchisonia, Orphile'ta, Orthis, Orthoceratites, etc., and those Cambrian rocks on which they rest. A great revolution in the ideas of many an old geologist, including myself, has thus been effected. Strengthened and confirmed as my view has been by the concordant testimony of Ramsay,...
Página 102 - bottom strata to establish lines of weakness or of least resistance in the earth's crust, and thus determine the contraction which results from the cooling of the globe to exhibit itself in those regions, and along those lines where the ocean's bed is subsiding beneath the accumulated sediments...
Página 327 - Ocean, and divided into two slopes by a watershed that nearly follows the political boundaryline, and throws the drainage to the Gulf of Mexico and the Arctic Ocean. The northern part of this plateau has a slope, from the Rocky Mountains to the eastern or Laurentian axis, of six feet in the mile, but is broken by steppes, which exhibit lines of ancient denudation at three different levels ; the lowest is of freshwater origin ; the next belongs to the Driftdeposits, and the highest is the great Prairie-level...