66 



THE BIOLOGY OF AN ANIMAL. 



c.c. 



1 



FIG. 29. Anterior portion of the earthworm laid open from above, with the alimen- 

 tary and circulatory systems dissected away, c.c., circum-oesophageal com- 

 missure ; e.g., cerebral ganglia ; ds, dissepiment : /, funnel of nephridium ; 7ip 

 nephridium ; o, ovary ; od, oviduct ; pTi, 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.M.C., ventral nerve-cord. 



