Q -Art. ■^.— T. Kaburaki : 



proceed stiaight backwards just along the dorsal side of the longi- 

 tudinal nerve cords, and in front of the penis mahe an inward 

 bend, rising at the same time, to enter the penis-bulb and then to 

 unite into a common duct, which communicates with the seminal 

 vesicle, after receiving numerous glands. 



The penis divided into two parts of the bulbous basal part of 

 muscular nature and tlie free conical intromittent part lying hori- 

 zontally in the penis-sheath, which opens to the exterior through 

 a narrow passage. Enclosed in the penis-bulb is the relatively 

 narrow and somewhat folded sen^inal vesicle, which passes behind 

 into the ejaculatory duct terminating at the tip of the penis. The 

 cavity is lined with a single layer of columnar cells. 



Text fig. ]. Genital organs of Zrtioxio^thia japonica, n. sp. in sagitlal section, dia- 

 grammatic all y shown. 



ed ejaculatory duct, gic gcnito-intfstinal canal, glo glandular organ, go genital 

 o)-eiiing, i intestii e, ttj^ " mvskulöse Diüsenorgan ", od oviduct, pu penis-sheath 

 SV seminal vesicl'", t'rf vas defeiens. 



Beliind the brain ( ccurs the paired ovary, occupying a ventral 

 position. At tlie postero-lateral aspect the oviduct springs from 

 the ovary in the form of a funnel-like widening, which soon as- 

 sumes the character of a narrow duct, pursuing a backward course 

 just along the outer side of the longitudinal nerve cords and 

 receiving in its course the vitelline glands at sevei'al points. The 



