Crustacea Malacostraca

Author : H. J. Hansen
Publisher : Forgotten Books
ISBN 13 : 9780484527798
Total Pages : 316 pages
Book Rating : 4.5/5 (277 download)

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Download or read book Crustacea Malacostraca; I (Classic Reprint) written by H. J. Hansen and published by Forgotten Books. This book was released on 2018-02-08 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Crustacea Malacostraca; I Under occurrence are given the discoveries within the region definitely defined above for the purpose of this investigation; under distribution the localities outside this region. Both and especially the distribution have caused the author considerable practical difficulties and some remarks on this subject will for several reasons be of service. All the ingolf localities are mentioned under each species. On the other hand, it would take up far too much space to give all the localities for a number of common species living in shallow water, especially for a no small number of Decapoda; in such cases I have contented myself with summaries for each main section of the coasts. In many cases, however, it is a matter of opinion how much might be usefully included and the correctness of the view adopted may indeed always be combated; some will undoubtedly think that I give too many details, others perhaps that I give too few. While it is difficult enough sometimes to find a suitable mean with regard to how many details based on our own investigations should be given, it becomes still more difficult to determine how much should be noted of the data of other authors concerning the occurrence of any species within the region mentioned. Sometimes the inclusion of such data is superfluous as I myself have seen the species from the same and quite adjacent localities, yet the exclusion of a citation may sometimes be considered as due to lack of knowledge or a slight. In other cases these older data are of doubtful quality sometimes even the supposed data prove incorrect when the author's specimens are examined so that the question of their inclusion or omission becomes even more difficult. If I were to indicate all the earlier notices and in every little case of doubt give a criticism, I should certainly succeed in securing myself against the complaint mentioned, but it is very doubtful whether I should advance science by being so unnecessarily prolix. What I include of the literature therefore depends upon personal opinion, but I have endeavoured to give a correct and complete picture for each species. 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.