. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 456 LORANDE LOSS WOODRUFF. division—on the average about three quarters of division per day lower than in the cultures subjected to the fresh culture medium, etc. This is without doubt due, as already discussed, in large part at least to the accumulated excretion products in the s series. But whatever the cause, the experiment affords an opportunity, to study the effect of naturally changed condi- tions, involving a lowered fission rate, on the periodicity of rhythms and endomixis. Now since the s subcultures divided at a mu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 456 LORANDE LOSS WOODRUFF. division—on the average about three quarters of division per day lower than in the cultures subjected to the fresh culture medium, etc. This is without doubt due, as already discussed, in large part at least to the accumulated excretion products in the s series. But whatever the cause, the experiment affords an opportunity, to study the effect of naturally changed condi- tions, involving a lowered fission rate, on the periodicity of rhythms and endomixis. Now since the s subcultures divided at a much lower rate than the parent cultures, and since endomixis appeared fairly synchronously in parent and 5 sets, it is obvious that endomixis consistently appeared in the s subcultures within a smaller num- ber of generations. In other words, the treatment of the 5. series apparently resulted merely in reducing the number of cell divisions in a given time and had practically no effect (except in the first period) on the occurrence of endomixis. On the basis of this set of cultures, then, endomixis is to a certain extent independent of the number of generations and more closely .related to a time factor, if such an expression may be employed. The B pair of cultures affords a fairly typical example (Fig. n). In B endomixis occurred at periods 59, 63 and 70; while in Bs it occurred at periods 59, 64 and 70. Thus the length of. 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 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. Woods Hole, Mass. : Marine Biological Laboratory
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