An Account Of The Crustacea Of Norway With Short Descriptions And Figures Of All The Species Vol 8

Author : Georg Ossian Sars
Publisher : Forgotten Books
ISBN 13 : 9781396152016
Total Pages : 1058 pages
Book Rating : 4.1/5 (52 download)

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Download or read book An Account of the Crustacea of Norway, With Short Descriptions and Figures of All the Species, Vol. 5 written by Georg Ossian Sars and published by Forgotten Books. This book was released on 2018-09-11 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from An Account of the Crustacea of Norway, With Short Descriptions and Figures of All the Species, Vol. 5: Copepoda Harpacticoida; Parts 1 and 2, Misophriidæ, Longipediidæ, Cerviniidæ, Ectinosomidæ (Part) The cephalosome is generally coalesced with the lst segment of the meta some, though in some few forms a well-marked demarcation between them may be found to exist. The lateral parts of this section are more or less expanded, being so deep in some forms, e. G. The genus Longipcdia, that they wholly include between them the oral appendages. It projects in front in a more or less distinct, generally lamellar rostrum, which in most cases is movably connected with the cephalic shield. The 3 succeeding segments of the metasome are always well defined, and are provided with more or less distinct epimeral plates. The last segment of the metasome, as stated above, has always a very movable articulation with the preceding segment, whereas it is firmly connected with the lst segment of the urosome. Its epimeral plates are generally obsolete, or at any rate much smaller than on the preceding segments. The urosome is composed of 5 segments. The first 2 of which, however, in the female are more or less completely coalesced, though in some forms a distinct suture between them is seen dorsally. In the male these 2 segments are always distinctly separated, and the lst of them pro jects at the end, on each side of the ventral face, to a small setiferous process. The caudal rami are in most cases short, and firmly connected with the last caudal segment. Of the apical setae, as a rule, only the 2 middle ones are well developed, the others being more or loss rudimentary. A single eye is generally present, though in some forms, especially in those from deep water, no trace of such an organ is to be found. 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.