NERVOUS SYSTEM OF THE EARTHWORM 151 



ns. 



vn.c. 



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

 c.c., 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, testis; v.g. and v.n.c., ventral nerve cord. (From 

 Sedgwick and Wilson.) 



