DICROCCELIUM LANCEATUM STILES AND HASSALL 67 



tudinal muscle fibres. The cirrus pouch itself has muscular 

 walls and harbors many unicellular glands called the prostata 

 which open by means of separate ducts into the median section 

 of the ejaculatory duct. 

 The female genital apparatus consists of a single ovary, 



OD 



SH _. 



FIG. 15. Interrelation of various ducts in the female reproductive or- 

 gans of Dicroccelium lanceatum after Leuckart. 0V, ovary; RS, receptacu- 

 lum seminis; SH, Mehlis' gland; VD, vitello duct; UT. uterus; OD, ovi- 

 duct; L. C, Laurer's canal; 0/7, opening of Laurer's canal. 



an oviduct, a receptacle for the sperm, two yolk glands with 

 their ducts, Mehlis' gland, a uterus and a Laurer's canal. The 

 ovary lies immediately behind the second testis, and the con- 

 siderably smaller receptaculum seminis lies immediately behind 

 the ovary, close to the dorsal surface of the animal. The oviduct 

 is a very short tube and soon receives the Laurer's canal and 

 duct of the receptaculum. The latter is about as long as the ovi- 



