Plate XXVI. 



Epibdella Ishikawae. 



Fig. 1. The whole worm viewed from the ventral side ; from a specimen killed free. 

 The nervous system is shaded with parallel lines. 

 „ 2. Hooks of the posterior sucker, x 204 diam. 



,, 3. The genital organs, vitcllarinm exclusive, viewed from the dorsal side. 

 X 50 diam. 



Epibdellaovata. 



Fig. 4. The whole worm viewed from the ventral side ; from a specimen killed free. 



X 50 diam. 

 ,, 5. Hooks of the posterior sucker, x 204 diam. 

 „ G. The genital organs, vitellarium exclusive, viewed from the dorsal side. 



X ahout 73 diam. .»■, an organ of prohlematic nature. 

 „ 7. Cross-section of the penis. x 204 diam. The cavity of the penis lies 



ahove dtic. ej. 

 „ 8. Section through one of the organs of problematic nature shown in fig. G, 



with some of the histological elements in its vicinity, x 204 diam. 



