mtft. 

 \ 



I.S 



A Z 



EZ 



-\ X3 



XH 



B 



KM.. :)7n. Hirudomedicinalis. A, dorsal ; B, ventral aspect ; . anus ; a. s. anterior sucker ; 

 /. first pair of eyes : e. 5. fifth pair ; ,/. /-,. <J . male gonopore ; <i. j>. $. female gonopore ; 

 mt/<. iiii.iith ; n. p. 7. first pair of nephridiopores ; n. p. 17. seventeenth pair; p. s. posterior 

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



