P L S N S.W 1910 



icf 



/ f\ 



I B 



I c 



z H 



5_ 

 ,6 



^ 



2B 



-«•- 



-7^ 



-••- 



ac 



3 B 



3 C 



Diiigrarus sliowing: tlie arrang-ement of tlie Auuuli iu the Genital Somite of Hirudiuea. 



