25 



LUMBRICUS 



i. Dorsal view of the anterior part, enlarged: prostomium; peristomium ; clitellum from segment 32 to 

 37 inclusive; segments 2 to 40. 





2. Ventral view: mouth; ventral setce; lateral setee; male genital pores (segment 15). 



fit 



<&/ ^*tA*fc 



-/ 



3. Extract a se^a with forceps. Mount and sketch under low power. 



