Fig. 6. Pattern of hatching after transverse cuts were made on the medulla terminalis (MT; experiment III-2). The effects of the lesions were classified into four types (see Table 4 for details of each type). Parts (A)-(H) represent the pattern of hatching in individual females; data represent either the percentage of hatched zoeas (A-C) or the number of hatched zoeas (and that of embryos dropped without hatching) (D-H). Filled bars represent the number of mature, swimming zoeas; hatched bars represent the number of mature, but non-swimming, zoeas; stippled bars represent the number of embryos dropped from the female without hatching. The 24 h L:D cycle is shown by the horizontal bar at the top of each graph (the filled section represents the dark phase). SU indicates the date when the surgery was performed. N is the total number of zoeas hatched. The asterisks indicate the date when the optic peduncles were inspected under the stereomicroscope. In (H), the arrowhead indicates the time when the incubation was stopped.

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