Description of Some Japanese Pelyclad Tttrbellaria. |5 



and open into this with their hind end. The penis is represented 

 by a long chitinous stylet; it hangs down vertically in the ciliated 

 tubular antrum musculinum, which opens to the exterior at the 

 hind end of the third quarter of body. 



The female genital organs consist of parts closely similar to 

 those of the preceding species. 



The present species seems to be nearly allied to Notoplana 

 ritrea (Lang 1884) from Naples. But it may be distinguished from 

 this species by the different arrangement of e3 T e-spots as well as by 

 the presence of a large accessory vesicle in the female genital system. 



Genus Hoplopltnta Laidlaw 1902. 



(Provisionally ranged under the Leptoplanidœ). 



7. Woploplana ornata, n. sp. 



(PI. II., fig. 7.— Textfigs. 14-16). 



This new species is founded on two individuals which were 

 obtained at Misaki near the low-tide mark. 



Body broadly oval, with complete margin, dorsally slightly 

 convex, rather firmly textured. Length 7 mm. ; breadth 5 mm. 



The dorsal surface shows very remarkable markings. Ground 

 colour milky white or somewhat buffy, traversed by broad bands 

 of a russet or brownish russet colour. In the median or central 

 parts the bands reticulate, bringing about a limited number of 

 unpigmented and unequal sized mesh-like spaces. From this 

 irregular reticulum there start out radial bands which are about as 

 broad as, or broader than, the interspaces between them and which 

 reach right to the body margin. One of the bands is situated 

 medianly at the anterior body end, while there exist a pair of them 

 at the posterior, laterally to the median line. Ventral surface of a 

 paler colour, revealing more or less distinctly the lobulated pharyn- 

 geal chamber in a whitish colour and also the pigmented bands 

 seen on the dorsal side; testicular follicles visible as reddish spots. 



Tentacles slenderly conical, destitute of pigments, each arising 

 from a small unpigmented spot situated at about the posterior end 

 of the first quarter of body. 



