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F I G . 3. Tho rnciopriinus component of stimulated bioluminescence in Woods Hole natural populatlona kept under constant darkness.
1: pwswterit rhvthm (exprimcnts stnrttwl 48 October 1965; water ternperaturn 11°C). B : no rhythm (started 16 Dewmhr;
wiltor temperature 5,s "C). " Eiidolpiwus rhythm was undetected from Sovember to early June, whereas exogenous dnmml
lmther: dwI1 rh)thm peraide4 throughout the p a r ". In Yentsch and Wid (1968). (Reproduced by kind p o m i W i o l l of the
wiiism mitilor.)
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