338 



AUSTRALIAN HIRUDINEA, I., 



The genital apertures are united, the common pore being on 

 the twenty-eighth annulus immediately behind a clitellar swelling 



Fig. 9. — Glossiphonia inflexa, sp.n. 



Ventral view showing the clitellum, and the reproductive aperture 



immediately behind it. 



which extends from the anterior border of the twenty-seventh to 

 the middle of the twenty-eighth annulus. 



Fig. 10. — Glossiphonia inflexa, sp.n. Dorsal view. 



Attached to the ventral surface were thirty-five eggs arranged 



singly. 



Semilageneta, gen.nov. 



Body thick, pear-shaped; dorsal surface convex, ventral surface 

 flat. Somites denoted partly by papillae, partly by sulci. Somites 

 triannulate in the greater part of the body, and twenty in 

 number, as seen on external examination. 



Semilageneta hilli, sp.nov. 



This leech was obtained in freshwater near Oberon, N.S.W., 

 by Dr. J. P. Hill. 



