Manual Of Conchology Structural And Systemic

Author : George Washington Tryon
Publisher :
ISBN 13 : 9781332303731
Total Pages : 456 pages
Book Rating : 4.3/5 (37 download)

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Download or read book Manual of Conchology, Structural and Systemic written by George Washington Tryon and published by . This book was released on 2015-08-05 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Manual of Conchology, Structural and Systemic: With Illustrations The Scaphopoda have hitherto received comparatively little attention 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 number 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 determination of genera and species. A classification of the Dentaliid 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, Jeffreys, Verrill and Gould. This great collection, undoubtedly richer than any other in existence 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. The published works of Dall, Watson and Jeffreys have been freely quoted herein; and it is to the critical acumen and large experience of these masters of conchological science, transplanted to our pages, that much of their value is due. An account of the Aplacophora is also included in this volume, partly for the sake of greater completeness, partly to call the attention of conchologists to this important group, which has doubtless been neglected by many who have opportunities for collecting. 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."