Report on the Scientific Results of the Voyage of H. M.S. Challenger During the Years 1873-76, Under the Command of Captain George S. Nares, R. N., F. R. S. and Captain Frank Tourle Thomson, R. N, Vol. 1: Botany (Classic Reprint)
Excerpt from Report on the Scientific Results of the Voyage of H. M.S. Challenger During the Years 1873-76, Under the Command of Captain George S. Nares, R. N., F. R. S. And Captain Frank Tourle Thomson, R. N, Vol. 1: Botany Recent continental islands are always situated on submerged banks, connecting them with a continent; and the depth of the intervening sea rarely exceeds 100 fathoms. They resemble the continent in their geological structure, while their animal and vegetable productions are either almost identical with ...
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Excerpt from Report on the Scientific Results of the Voyage of H. M.S. Challenger During the Years 1873-76, Under the Command of Captain George S. Nares, R. N., F. R. S. And Captain Frank Tourle Thomson, R. N, Vol. 1: Botany Recent continental islands are always situated on submerged banks, connecting them with a continent; and the depth of the intervening sea rarely exceeds 100 fathoms. They resemble the continent in their geological structure, while their animal and vegetable productions are either almost identical with those of the continent, or if otherwise, the difference consists in the presence of closely allied species of the same types, with occasionally a very few peculiar genera. They possess in fact all the characteristics of a portion of the continent, separated from it at a recent geological period. Ancient continental islands differ greatly from the preceding in many respects. They are not united to the adjacent continent by a shallow bank, but are usually separated from it by a depth of sea of a thousand fathoms or upwards. In geological structure they agree generally with the more recent islands; like them they possess mammalia and amphibia, usually in considerable abundance, as well as other classes of animals; but these are highly peculiar, almost all being distinct species, and many forming distinct and peculiar genera or families. They are also well characterised by the fragmentary nature of their fauna, many of the most characteristic continental orders or families being quite unrepresented, while some of their animals are allied, not to such forms as inhabit the adjacent continent, but to others found only in remote parts of the world. This very remarkable set of characters marks off the islands which exhibit them as a distinct class, which often present the greatest anomalies and most difficult problems to the student of distribution. The zoological characteristics of these three classes of islands are often associated with parallel botanical peculiarities; but, owing to the more numerous and potent agencies operat ing in the distribution of plants, their peculiarities are usually very much less pronounced. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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All Editions of Report on the Scientific Results of the Voyage of H. M.S. Challenger During the Years 1873-76, Vol. 24: Under the Command of Captain George S. Nares, R. N., F. R. S. and the Late Captain Frank Tourle Thomson, R. N.; Zoology; Plates (Classic Reprint)