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University of California Publications in Zoology Volume 19 ebook

University of California Publications in Zoology Volume 19 ebook

University of California Publications in Zoology Volume 19.cCalifornia University
University of California Publications in Zoology Volume 19
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Author: California University
Number of Pages: 154 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130374568
File size: 8 Mb
File Name: University.of.California.Publications.in.Zoology.Volume.19.pdf
Download Link: University of California Publications in Zoology Volume 19
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...as opposed to absulcal, which is analogous to dorsal. The secondary sulci usually branch from the chief longitudinal sulcus, the resulting cusps being variable in size, shape and permanence. At times the general form becomes spherical and globular, the posterior end truncated, or ovate and conical, with acute posterior end, the sulcus being faint in both cases. Fig. A. Pseudopodia of Collodictyon. Diagrammatic. X 1000. 1-2. Lobose. 3. Undulate. 4. Digitate. 5. Filose. 1-5. From the sulcus. 6. From all parts of the surface. The four flagella are paired, each pair arising from a single basal granule, the two granules being embedded in the irregular chromatoidal blepharoplast which is surrounded by a granular, less darkly staining archoplasm or modified cytoplasm. The flagella are typically whiplike, in length averaging that of the major axis of the body, at times a little longer, measuring in one instance 68 to 70/i. They taper toward the tip. France (1899) used zinc chloride to bring out their full length and further observed their base to be granular. Language is inadequate to describe the beauty of their elegant backward curves. They function both in pulling and propelling the body forward, in attachment to the substrate while the organism rotates on its major axis, as a tactile organ for directing locomotion, and actively in offense and defense. In attacking a dinoflagellate they were observed to catch their prey with all four flagella; they then allowed themselves to be pulled about until the dinoflagellate was exhausted, when it was drawn back to the anterior end of the sulcus and engulfed. On another occasion when Collodictyon was being drawn toward the mouth of a rotifer, it spread its flagella and lodged upon the oral membrane; at other times it was ...

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