■20 Art. 4.~ S. Goto and H. Kikuchi: 



right and passing on the ventral side of the vitellarium opens into 

 an elongated botryoidal cavity at about the level of the hind end 

 of the penis (fig. 14). The wall of the canal is comparatively 

 thick and is provided with longitudinal and circular muscle fibres. 

 The botryoidal cavity, which may be called bursa vaginalis, lies 

 with its long axis oblique to that of the body and opens on the 

 ventral side close to the lateral margin, receiving the vaginal canal 

 not at its bottom but a short way aside towards the right margin 

 of the body. The bursa vaginalis is ciliated on its inner surface 

 and surrounded by inner longitudinal, middle circular and outer 

 oblique muscle fibres, which are modifications of the dermal 

 musculature of the body. Besides these fibres there are numerous 

 unicellular glands opening into its cavity; their staining capacity 

 is intermediate between those of the two prostate glands. 



This new genus may be characterized as follows: Gyrodacty- 

 lidse without eyes; with a caudal disk bearing two pairs of hooks, 

 each pair connected by a transverse piece; without marginal 

 hooks; with a lateral vagina. Paired intestinal cceca united 

 behind and with lateral secondary coeca. 



