B 



FIG. 370. Hirudomedicinalis. A, dorsal ; B, ventral aspect ; a. anus ; . . anterior sucker ; 

 e. 1. first pair of eyes ; e. 5. fifth pair ; g. p. $ . male gonopore ; g. p. $ . female gonopore ; 

 nit/,, mouth; n. p. 1. first pair of nephridiopores ; n. p. 17. seventeenth pair; p. s, posterior 

 sucker ; s. p. sensory papillae ; I XXVI. segments. (Partly after Whitman.) 



