Fig. 119.— Hirudo quinquestriata. Dissection from the dorsal aspect, a, anus; 

 br, brain ; cr. /, first diverticulum of crop, contracted ; cr. 1' , the same expanded ; 

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

 d. ej, ductus ejaculatorius; gn. 1-23, ganglia of ventral nerve-cord; int. in- 

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

 ///, pharynx ; /■■ s, posterior sucker ; ret, rectum ; st, stomach ; is. I — Q, testes; 

 •va, vagina ; v. d, vas deferens ; 7'. sem, vesicula seminalis. 



206 



