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OverviewExcerpt from Figures and Descriptions of Canadian Organic Remains: Decade II, Graptolites of the Quebec Group The specimens which have usually been observed or represented are simple disconnected stipes, doubtless the dismembered or fragmentary portions of fronds, which, presenting in the different species great varieties of form and aspect when entire, are nevertheless composed of parts so similar that these fragments, though indicating specific differences, Offer little clue to a knowledge of the entire form. The name Graptolithas was established by Linnaeus in the first edition of his Systema Naturae, 1736, and applied by him to the straight or curved forms which are serrated (celluliferous) upon one side only, of which G. Sagittarius has been regarded as the types? The propriety of this term is more readily perceived in its application to the fragments of the stipes of monoprionidian forms than to the central portions of the body of the same. In the spirally-enrolled forms, or those with four or more stipes uniting in a central disc, as well as in the variously-branching forms, the analogy is not so perceptible. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com 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. Full Product DetailsAuthor: Professor James HallPublisher: Forgotten Books Imprint: Forgotten Books Dimensions: Width: 15.20cm , Height: 1.50cm , Length: 22.90cm Weight: 0.376kg ISBN: 9781332456802ISBN 10: 1332456804 Pages: 278 Publication Date: 28 December 2018 Audience: Children/juvenile , Children / Juvenile Format: Paperback Publisher's Status: Unknown Availability: In stock Limited stock is available. It will be ordered for you and shipped pending supplier's limited stock. Table of ContentsReviewsAuthor InformationTab Content 6Author Website:Countries AvailableAll regions |