The Danish Ingolf-Expedition, Vol. 5 (Classic Reprint)

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Excerpt from The Danish Ingolf-Expedition, Vol. 5 The paper on the Actiniaria, of which I now present the first part, has been drawn up according to the same plan as my reports on the Ceriantharia and Zoantharia of the Ingolf-Expedition. The main part of the material examined by myself belongs to the museums in Copenhagen and Stockholm. I have had at my disposal a rather great collection mainly enclosing the forms dredged by Romer and Schaudinn during their journev around the Spitzbergen, and I have also examined smaller collections from the museums in Upsala, Gothenburg, Lund, Christiania, Bergen, Drontheim, Tromso, Francfort on the Main and Petrograd. I beg to express my best thanks to all, who have supported my work through lending of material. The paper on the Ingolf-Actiniaria will be divided into four sections: 1) Description of the species. 2) Survey of the literature with critical notes on the arctic and northern Actiniaria. 3) Distribution of the species. 4) Contribution to the anatomy, genealogy and classification of the Actiniaria. In the present paper I have described all families occurring in the arctic and northern waters excepting the forms which have been referred to the old family Sagartiidae. I have given special attention here to the size and distribution of the nematocysts and spirocysts. As before emphasized by me the stinging capsules are of great importance to the classification. Nearly related genera show great agreement in the appearance and distribution of the nematocysts, and the species are often characterised by the different sizes of these latter, though in many cases the differences are not great. In fact I think that it is impossible to put up a good system of the Actiniaria without considering the stinging capsules. Concerning my statement of the breadth of the stinging capsules I will remark that it is approximate. 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.