Fig. 9

Details of Fig. 7 (flash series in an intact Eusyllis blomstrandi). Note the increasing duration of the flashes, the recruitment of more anterior segments, the increasing duration of bright light emission per segment, the delay in the beginning of bright light emission existing between the more anterior and the posterior segments in (b) and (c), and the prolonged emission and dim light phase typical of the last flash in a series (c). Same coordinates and symbols as in Fig. 5. The non-luminescing anterior segments (see Fig. 7) are omitted from this graph