g. V. 



g. V. 



b.p. 



a. 

 Diagram showing at a and b the arrangement of the genital grooves and brood pouch in 

 Tanganyicia rufofilosa and Melania episcopate. Compared with the opisthobranch 



Auricula c. g. v., Genital groove, b. p., Brood pouch, e. p., evertabl 



opi 



e penis. 



iS* 



