I 



v.et 





FIG. ng. Hirudo quinquestriata. Dissection from the dorsal aspect, ,anus; 

 ^f, brain; cr. /, first diverticulum of crop, contracted; cr. /', the same expanded; 

 cr. //, the last diverticulum of the crop, contracted; cr. /', the same expnnded; 

 <i. e/, ductus ejaculatorius; gn. 1-23, ganglia of ventral nerve-cord ; /;//. in- 

 testine ; /. ?', lateral vessel ; nph. /-/7, nephridia ; ov. s, ovarian sac; f, penis; 

 ///, pharynx ; /. s, posterior sucker ; ret, rectum; st, stomach ; ts. i Q, testes; 

 7'ri , vagina ; 7>. d, vas deferens ; v. sew, vesicula seminalis. 



206 



