30 LUMBRICUS 



ii. Transverse section under low power, (i) Body-wall: cuticle; epidermis (ectoderm); circular and 

 longitudinal muscular layers. (2) Coelom. (3) Alimentary canal: typhlosole; yellow cells; muscular layers; 

 intestinal epithelium (endoderm). 



Nerve cord ; dorsal blood vessel ; sub-intestinal blood vessel ; sub-neural blood vessel ; lateral setts ; ventral setce ; 

 nephridia. 



'if* * 



'/' m^r -'" 



<!S* -vVt*^ 



12. Longitudinal section of anterior end : prostomium; peristomium; mouth; pharynx; oesophagus; cssopha- 

 geal pouches and glands; anterior and posterior vesiculce seminales; supra-pharyngeal ganglia; sub-pharyngeal 

 ganglia; nerve cord; septa; other names as in u. 



