2ß Art, 9. — M. Yeri and T. Kaburaki : 



12. jPsfjf (1 osf ylochu s fttkeshitai, n. sp. 



(PI. II., fig. 11.— Textfigs. 27-29). 



Numerous specimens of this species were obtained* at the low- 

 water mark in the neighbourhood of Matsuwa, near Misaki. 



Body oval, more broadly rounded anteriorly than posteriorly, 

 measuring 18 mm. long by 9 mm. broad. 



Colour of dorsal surface huffy, darker in the median parts over 

 the position of pharynx, uniformly dotted all over with minute 

 brown spots. Ventral side much paler; pharynx and reproductive 

 system discernible with moderate clearness on this side. 



Tentacles very small, bluntly 

 conical, transparent, un pigmented, 





situated at about the hind border of 



%äX5L • 



the first fourth of body. 



Tentacular eye-spots forming an 

 irregular compact group at base of 

 !.•[[.» each tentacle. Cerebral eye-spots 



irregularly scattered over the brain 



Textflg. 27. Eye-spots of Pseudostylochus . , 



takeshitai. region m two lateral groups (textng. 



27). Without marginal eye-spots. 



Mouth situated nearly in the centre of ventral surface; 

 pharyngeal pocket with 8-12 pairs of irregularly lobed diverticula 

 corresponding to the folds of pharynx. Main gut giving rise to 8 

 pairs of lateral intestinal branches. 



Seminal canals (textng. 28, sc) are distinct unbranched canals, 

 continuous across the median line behind the female genital 

 aperture. From that point they run forward, gradually diverging 

 until about the middle of body, where each forms a loop to pursue 

 a backward course nearly parallel to, and on the inner side of, its 

 outer parts. In front of penis the canals unite into a single short 

 duct which joins the spherical seminal vesicle (textfigs. 28, 29, sv) 

 from behind. Posteriorly the vesicle gives rise to the ejaculatory 

 duet (W). which, after pursuing a backwardly, and then upwardly 

 directed, tortuous course, receives the opening of the oblong 



