e. p. 
b. p. 
Diagram showing at a and /; the arrangement of the genital grooves and brood pouch in 
Tanganyicia rufofilosa and Melania episcopa/is. Compared with the opisthobranch 
Auricula c. g. v Genital groove, b. p. t Brood pouch, e. p., everlable penis. 
iS* 
