28 Art. 9.— M. Yevi and T. Kaburaki : 



bourhood of the junction of the uterine duct, This short duct 

 shows, in the middle of its course, an obliquely posteriorly directed 

 annular outbulging; thus, there arises a small conical and anteriorly 

 directed process which projects into a swelling of the lumen and is 

 axially traversed by a part of the duct, At its hind end the 

 unpaired uterine duct divides into two uteri («). These extend 

 forward, running parallel to the outer limbs of seminal canals, and 

 finally join together in the median line in front of the pharynx. 



13. JPsettfl ostylochus ftilriis. n. sp. 



(PI. II., fig. 10.— Textfigs. 30-32). 



Numerous specimens of this new species were captured about 

 the low-tide mark in the neighbourhood of Misaki. 



Body broadly oval, the anterior end being somewhat broader 

 than the posterior, reaching 11-13 mm. in length and 5-6 mm. in 

 breadth. 



Ground colour of dorsal surface huffy, medianly darker in the 



pharyngeal region, densely dotted with minute brownish orange 



pigments. 



Tentacles indistinct, bluntly conic- 

 30 . . 



al, situated at about the hind border 



of the first quarter of body, about 



1 mm. apart. 



Tentacular eye-spots confined to 



base of each tentacle, forming an 



irregular group. Cerebral eye-spots in 



two elongate tracts over the brain 



Textfig. 30. Eye-spots of Pseudo- ... 



styiochus fuivus. region and on either side of the median 



line (textfig. 30). 

 As in the preceding species, the seminal canals (textfigs. 31, 

 32, sc) unite, after running backward on either side of the median 

 line, into an impaired common duct slightly in front of the penis. 

 (p). That duct runs foreward, bends abruptly 1 tackward and joins 

 the tubular seminal vesicle (sv) with muscular wall. The vesicle 

 continues into a slender ejaculatory duct (cd) which pursues a 

 somewhat tortuous course to open at the tip of penis. At the base 



