Fir., itq. — Hirudo quinquestriata. Dissection from the dorsal aspect, a, anus; 



br, brain; cr. i, first diverticulum of crop, contracted; cr i\ the same expanded; 

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

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

 testine ; /. v, lateral vessel ; nph. i-ij , nephridia ; ov. s, ovarian sac; /, penis; 

 fih, pharynx ; /. s, posterior sucker ; ret, rectum; st, stomach ; t$. 1 — q, testes; 

 r-a, \agina ; v. d, vas deferens ; v. icm, vesicula seminalis. 



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