NERVOUS SYSTEM OF THE EARTHWORM 147 



FIG. 60. Anterior part of the worm laid open to show the ventral organs* 

 ex., Circum-oesophageal commissures; e.g., cerebral ganglia; ds^, dissepiment; 

 /, funnel of nephridium; np, nephridium; o, ovary; od, oviduct; ph. pharynx; 

 ps, prostomium; r.s., seminal receptacle; s.d., sperm duct; s.f., sperm funnel; 

 s.v.l., lateral seminal vesicle; t, testjs; v.g. and v.n.c., ventral nerve pord. (From 

 Sedgwick am 1 Wilson.) 



