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Title: The Biological bulletin
Identifier: biologicalbullet116mari (find matches)
Year: [1] (s)
Authors: Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983
Subjects: Biology; Zoology; Biology; Marine Biology
Publisher: Woods Hole, Mass. : Marine Biological Laboratory
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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MITOTIC RHYTHMS IN THE EUGLENINEAE 165
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Time FIGURES 1 and 2. The number of cells per thousand in mitosis at half-hourly intervals during one, two or three consecutive nights, plotted as mitosis percentage against time. All results are for biphasic cultures growing in the natural day-night cycle, the dark period be- ginning at 8 PM. FIGURE 1. Green species: A, Euglena spirogyra; B, Euglena viridis. FIG- URE 2. Green species: A, Phacus pusillus; B, Phacus pyrum; C, Trachelomonas bulla; D, Trachelomonas grandis. occurred from 2% to 4^ hours after the onset of darkness in all species. The maxima for Euglena viridis (Fig. 1, B), Eutreptia pertyi and Phacus pusillus (Fig. 2, A) occurred at the same time on three successive nights; those for Euglena spirogyra (Fig. 1, A) covered a two-hour period within three nights. The span

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