mlh 



*p< 



f>.S 



FIG. 404. Hirudo medicinal is. A, dorsal ; B, ventral aspect ; a. anus ; a. *. anterior sucker ; 

 e. 1. first, and e. 5. fifth pair of eyes; g. p. (j. male gonopore ; g. p. ?. female gonopore ; 

 ruth, mouth; np. 1. first, and np. 17. seventeenth pair of nephridiopores ; p. . posterior 

 sucker ; *.p. segmental papillse ; I. XXVI. segments. 



