PRELIMINARY DESCRIPTIONS OF SOME JAPANESE TRICLADS. IJl 



on hand ; a short stretch of a longitudinal canal, running along the ventral 

 side of atrium and joining this at a point about midway between penis tip 

 and the junction of vagina with atrium, probably represents the unpaired 

 terminal part of united oviducts. Receptaculum seminis tubular, slender, 

 running over penis and extending a short distance beyond this anteriorly. 



Localities : — Cool running brooks in the wooded hills to the east of 

 Toyohara (Vladimirofka), Saghalin, found together with Planaria pellu- 

 cida. Also obtained in a spring near Tretia Padi, north of Korsakoff, 

 Saghalin. Ijima coll., June 1906. 



