. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. NBBELA COLLAEIS. 97 their heads and displaying their cilia, and, when alarmed, retiring suddenly into the cavity. Whilst this took place the posterior part of the rotifer (it did not exhibit the usual tail-like process) remained sta- tionary for a time; the anterior half would again slowly extend; and the ciliated processes would un- fold but a short distance beyond the orifice of the test. The action of the maxillee was distinctly visible through the transparent test-walls. The cilia were used for purpos
. The British freshwater Rhizopoda and Heliozoa. Rhizopoda; Heliozoa; Freshwater animals. NBBELA COLLAEIS. 97 their heads and displaying their cilia, and, when alarmed, retiring suddenly into the cavity. Whilst this took place the posterior part of the rotifer (it did not exhibit the usual tail-like process) remained sta- tionary for a time; the anterior half would again slowly extend; and the ciliated processes would un- fold but a short distance beyond the orifice of the test. The action of the maxillee was distinctly visible through the transparent test-walls. The cilia were used for purposes of locomotion, and it was curious to see a test of Nebela collaris dragged about by the rotifer in its tortuous course through the Fia. 86.—Test of Nebela collaris taken possession of by a rotifer. The maxillae are seen -J- in. (5 mm.) above the aperture of the test. (Ee-drawn from a rough sketch by Mr. Cash.) x 280. One example met with was interesting from the fact that the test of the Nebela contained not only a living rotifer—apparently young—but also, along with it, two ova. The mature rotifer was free, and appeared to make great efforts to escape from its prison, but this was impossible from the fact that the neck was choked with mucus, probably what remained of the rhizopod protoplasm; and the explanation which suggested itself was that the eggs of the rotifer had been deposited, and were being hatched out, in the cavity of the test. If that were so one is almost VOL. II. 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cash, James, 1839-1909; Hopkinson, John, 1844-1919. joint author; Wailes, George Herbert, 1862-. London, Printed for the Ray Scociety
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