130 



THE PHYSIOLOGY OF EARTHWORMS 



Fig. 38. (a) Cerebral ganglia of earthworm; D = dorsal; V = 



ventral ; (b) section through ganglion showing region of ganglion 



cells, hatching indicates area containing a-cells and capillary 



network (K) (from Hubl, 1953). 





'^mm^^'^' 



fWiv'^^Z 





F.Ne. 



Fig. 39. Section through posterior region of cerebral ganglion 



oi Eisenia foetida. C.a. = a-cells forming neurosecretion; C.N. = 



neuroglial cells; F.N. = neuroglial fibres; F.M. = moniliform 



fibres; F.Ne. nerve fibres (from Herlant-Meewis, 1956). 



