The Danish Ingolf-Expedition PDF Download

Author: William Lundbeck
Publisher:
ISBN: 9781332169887
Category : Science
Languages : en
Pages : 194

Get Book Here

Book Description
Excerpt from The Danish Ingolf-Expedition: Part 1., Contents; Will, Lundbeck; Homorrhaphidae and Heterorrhaphidae The present treatise is the first part of a work on the Porifera collected by the Ingolf-expedition. The material for this work, however, does not consist of that of the Ingolf-expedition only, but I have, for the sake of completeness, included all the sea-sponges, found in our museum, from Greenland, Iceland and the Faroe Islands, and upon the whole from the territory treated of here. The latter material has especially been collected by the Greenland-expeditions that have been sent by the commission for the geological and geographical examination of Greenland; partly also by the men of war that have navigated the seas round Greenland and Iceland, as also by some other collectors; especially must be mentioned a considerable collection, made by Dr. Mortensen in 1899 at the Faroe Islands. Of the whole material, however, the portion collected by the Ingolf-expedition during its two cruises in 1895 and 1896 forms by far the greater part. The collection of sponges made by this expedition was quite exceptionally great, greater, I think, than any made by any single expedition before. Finally I got from the museum in Bergen by the kindness of Dr. Brunchhorst the sponges of the Norwegian North-Atlantic Expedition, which I have included here, as the earlier work on those sponges needed a revision. The geographical territory of the present work may therefore be given thus: the eastern part of the Davis Strait and the sea north of a line through the southernmost station of the Ingolf at about 57 L. N. across to the south of the Faroe Islands, that is to say, the whole of the North-Atlantic (species from the Norwegian fjords, however, have not been included). From this territory I have endeavoured to include all the species, also those that are not found in the material, but have been mentioned in the literature are found within the territory. With regard to the terms used in the descriptions I shall premise a few remarks. The terminology employed in describing the spicules is mainly the same as has been used by Ridley and Dendy and by Topsent, and upon the whole by all recent authors, so that an explanation will be unnecessary. For the more or less membranous part of the body of the sponge which forms the surface and covers the subdermal cavities, the term dermal membrane has been employed. 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."