Download or read book Siboga Expeditie Vol 9 written by Albertine D. Lens and published by . This book was released on 2015-08-05 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Siboga-Expeditie, Vol. 9: The Siphonophora of the Siboga Expedition The enormous difficulties which accompany any attempt at systematic definition and description of preserved specimens of the very delicate Siphonophora have been forcibly insisted upon by Chun in the preface to his work on the Siphonophores of the Plankton expedition (1897). These difficulties are increased by the fact that the different forms and species are as yet in so many respects still very imperfectly known and have often been insufficiently described. Moreover the literature of the subject is already very extensive (120 different titles are cited in our list) and many articles are neither lucid nor exhaustive. Papers that have been written by authors who have examined living specimens are often very difficult to interpret for those wo find themselves restricted to observations on preserved material. We have attempted to become acquainted with the specimens of former expeditions as far as they are vet to be found in the different Museums. Of the Challenger SipJionopJiora the British Museum contains no further remnants than a certain number of specimens of Rliodalia niiratida Hkl. Of all the other species described in Haeckel sbulky volume - also of his own private collection - no traces are left. We were informed by the Curator, Mr. R. Kirkpatrick, that Prof. Haeckel had written to him, that a great number had been submitted to anatomical investigation and that the rest had been in an unsatisfactory state of preservation. This may explain their present deficiency. We have also examined specimens that are contained in the Musee d' Histoire Naturelle in Paris, in the Berlin Museum, in the Museum at Leipzig University and in the Museum of Comparative Zoology at Cambridge, Mass. and in the aquaria of the Zoological Station at Naples. 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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