12 G. Eisen, On tue anatomy of Ocnerodrilus. 



Fig. 9: t. t = testes. 



» eff = efferent ducts. 



)) ov = ovaries. 



» ovd = oviducts. 



1) g. p. = genital porus. 



» rs = receptacle. 



PI. II. 



Fig. lU: The front part of the nervous système. 



» 11: a part of the receptacle. 



» 12: The same part seen in optical section. 



Fig. 13: One of the segmental organs. 



» ex. or. = exterior orifice. 



» in. or. = interior orifice. 



» d.ss. = dissepiment. 



» 14: A part of the efferent ducts just at their junction. 



» 15: same ducts half way between the junction and the genital porus. 



» 16: same ducts close to the genital porus. 



» 17: one of the testes. 



» 18: the junction of the efferent ducts and the receptacle in the genital porus. 



» 1 9: one of the ovaries. 



» 20: one of the oviducts. In the interior opening are seen several matured eggs. 



