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Download Quarterly Journal of Microscopical Science, Vol. 6 (Classic Reprint)

Download Quarterly Journal of Microscopical Science, Vol. 6 (Classic Reprint)

Quarterly Journal of Microscopical Science, Vol. 6 (Classic Reprint). Edwin Lankester

Quarterly Journal of Microscopical Science, Vol. 6 (Classic Reprint)
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Author: Edwin Lankester
Page Count: 320 pages
Published Date: 27 Sep 2015
Publisher: Forgotten Books
Publication Country: United States
Language: English
ISBN: 9781330368558
File size: 8 Mb
File Name: Quarterly.Journal.of.Microscopical.Science,.Vol..6.(Classic.Reprint).pdf
Download Link: Quarterly Journal of Microscopical Science, Vol. 6 (Classic Reprint)
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Excerpt from Quarterly Journal of Microscopical Science, Vol. 6 On the 13th of August, 1856, after filling a marine aquarium, containing about three gallons of water, I detected a small naked-eyed Medusa swimming vigorously near the surface. This minute creature was immediately made the subject of careful study, and it turned out to be a species of Thaumantias new to Britain (fig. 1, Pl. I). So far as I can ascertain, it has not been described by any author abroad; I have therefore thought it worthy of a separate notice. The water containing the Medusa had been procured four days previously from the shore near Leith, and had been kept in an earthen vessel hermetically closed. The animal was only preserved alive until the 16th of the same month, in consequence of injuries sustained during a prolonged and often-repeated microscopic examination. Referring to the various organs in detail, I allude in the first place to the umbrella. The form and general aspect of this structure resembles that of the more typical species, being hemispherical, transparent, colourless, smooth, slightly elongated vertically when in a state of rest, the transverse diameter measuring rather more than the third of an inch, and becoming much increased during contraction, the length of the disc, at the same time, being proportionately lessened. To remark particularly on such admeasurements may appear trifling, but it is useful as an aid to diagnosis, because the animal bears a very marked resemblance to Thaumantias punctata and T. Thomsoni. These, however, present a more depressed umbrella. Again, it is similar, at first sight, to T. convexa; but this species has the umbrella more cylindrical, and there are other distinguishing characters, which will be alluded to presently. The circumferential portion of the umbrella is fringed by twenty-four tentacula of extreme delicacy and unusual length; also, by eight ocelli, a circular gastro-vascular canal, and a well-defined shelf-like veil directed inwards. 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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