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Inhaltsangabe
Excerpt from Manual of Conchology, Structural and Systemic: With Illustrations
This great collection, undoubtedly richer than any other in exist ence in deep sea forms, was, with generosity rarely equalled, placed at my disposal by Prof. William H. Dal], Honorary Curator, and the authorities of the Museum. My most earnest thanks are due to them for this and other courtesies.
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Excerpt from Manual of Conchology, Structural and Systemic: With Illustrations
The Scaphopoda have hitherto received comparatively little at tention from either conchological or morphological naturalists. No other molluscan group of like rank and extent exists upon which the anatomical data are so scanty, or restricted to so small a num ber of species; and as the Class consists mainly of deep sea dwellers, the list of species now known is doubtless a mere fraction of the grand total of living forms.
Consonant with the general plan of the Manual, this volume treats primarily of the system of Scaphopods, and the determina tion of genera and species. A classification of the Dentaliidae based upon features hitherto untried for this purpose is submitted; and the innovation is made of including a catalogue of fossil species, largely with a view to rectify the current nomenclature and prevent future complications by the duplication of specific names. The labor of collating the references to fossil forms has been, in large measure, accomplished by Dr. Benj. Sharp.
The work is based upon the collection of the Academy of Natural Sciences, containing a large proportion of known shore species, and upon that of the United States National Museum, including the types of dall, J arrears, verrill and gould.
This great collection, undoubtedly richer than any other in exist ence in deep sea forms, was, with generosity rarely equalled, placed at my disposal by Prof. William H. Dall, Honorary Curator, and the authorities of the Museum. My most earnest thanks are due to them for this and other courtesies.
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.
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Manual of Conchology, Structural and Systemic: With Illustrations
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Paperback. Zustand: New. Print on Demand. This book examines the Dentalium, a mollusk commonly called tusk or tooth shells, which have been largely overlooked by researchers despite making up a significant portion of marine life for centuries. The author positions the Dentalium as an important part of the marine ecosystem, providing food for other organisms and helping to clean the water. The book considers that evolutionary changes in the Dentalium may be linked to changes in their environment and feeding habits. It also recognizes the need for conservation efforts to protect these creatures and the diverse marine environments in which they live, including seagrass beds and coral reefs. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9781332303731_0
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