REGENERATION IN ANNELIDS
207
FIG. 32. Eisenia foetida. Cerebral ganglia during ovulation. aC, Active 'a' cells. Ax,
'a' cell axons containing neurosecretion; V, intraneural blood vessel. (Herlant-Meewis,
1956.)
FIG. 33. Eisenia foetida. Aspect of cerebral ganglia during period of sexual rest. Same
scale as Fig. 32. aC, Resting 'a' cells. For further explanation, see Fig. 32. (HerlantMeewis, 1955.)