778 TUEBELLARIA OF THE THIRD TANGANYIKA EXPEDITION. [Nov. 13. 



close behind the free end of the pharynx. The epithehuni of its 

 walls is secretory. The uterine duct {id.') is at first very small 

 and lies immediately dorsal to the cavity of the base of the penis. 

 Further back it is pushed aside by the penis, increases consider- 

 ably in size as it approaches the antrum, and here its epithelium 

 takes on a secretory character (ej).'), whilst around the duct lie 

 numerous gland-cells (gl). There is no indication of any bursa 

 copulatrix. 



Text-fig. 126. 



Planaria tang any iTcee, much enlarged. 

 For explanation of the lettering, see text. 



The vasa deferentia {v.d.) open into a chamber at the base of 

 the penis (pr.). This chamber is lined by an epithelium Avhich, 

 in front of the level of the openings of the vasa deferentia and 

 dorscdly behind them, is evidently concerned in the production of 

 a o-ranular secretion; the epithelium of the rest of the chamber is 

 of'^a different character, flattened, and apparently not secretory, 

 but in parts this has been lost. The penis {p.) is conical and 



