38 Art. 4.— T. Kaljuraki : 



the lumen in folds, as stated by von Graff. The penis-sheath 



passes behind into the narrow passage which dips below to open 



into the vestibnlum from above. 



The paired ovary is nearly oval in shape and occupies a ven- 

 tral position somewhat behind the cerebral meshwork. At the 



postero-lateral aspect the oviduct leaves the ovary as an ampul- 

 laceous passage which soon assumes the character of a narrow duct, 

 proceeding backwards above the longitudinal nerve cords and 

 receiving the vitelline glands at several points of its course. In 

 the region of the genital aperture the oviduct bends mediad, rising 

 upwards at the same time, and finall}' unites with its fellow of the 

 opposite side to form the glandular organ. The oviduct has its 

 wall formed by a ciliated epithelium and a thin muscular layer. 



The glandular organ, which is embedded in the muscular 

 sheath, presents a fairly wide lumen, internally lined with an un- 

 folded epithelium and externally with a layer of parenchyme includ- 

 ing muscular fibres, and opens into the vestibulum close behind 

 the opening of the penis-sheath. Sometimes the organ is distended 

 into a wide space with a plicated wall. Near the communicating 

 point of the oviducts the organ is supplied Avith numerous glands. 



17. JPlacoeephnltts f/lfnieus, ii. sp. 



(PI. I., Fig. 17.— Text figs. 20, 21.) 



This planarian, of which four specimens were collected by 

 myself in Jul}-, 1916, on the stone wall in Yoshino, is remarkably 

 handsome and occurred in pairs, one individual followed b}^ the 

 other. 



The head presents a small semi-lunar shape and is as broad 



4 



as the trunk, from which it is only marked off by a slight neck- 

 like constriction. The trunk is exceedingly^ elongate, slender and 

 of similar ])readth for the greater part, though it gradually tapers 

 some little distance from the posterior end to a bluntly i^ointed ex- 

 tremity. Extending from the neck to the posterior end of the 

 body, in the mid-ventral line, is a slightly raised ridge, the sole, 

 rather less than one-third the breadth of the body. In length they 

 range from 120 mm. to 200 mm., measuring 3-5-4 mm. in breadth. 



