(} Art. 9.— M. Yori and T. Kaburaki : 



Numerous testes situated in the ventral half of body. The 

 seminal canal of either side pursues a somewhat winding course 

 before entering the lateral lobes of the seminal vesicle, which is a 

 large trilobed muscular body as in St lUtomlis (Veekill), St 

 orientalls Bock, etc. The median vesicle gradually narrows towards 

 the tip of penis, forming the ejaculatory duct. In its course, the 

 duct receives dorsally that of the prostate a short distance in front 

 of penis base. The prostate duct passes forward, dorsally to the 

 ejaculatory duct, to join the prostate, which is of the Djibouticnsis 

 type and is a pear-shaped, muscular organ divided into small 

 compartments. Imbedded in the parenchyma around the prostate 

 are numerous glandular cells opening into its lumen. The small 

 conical peuis is altogether devoid of chitinous spines or stylets and. 

 lies in the anterior part of the antrum musculinum. 



As usual the ovaries are dorsally situated. The uteri run 

 backward on either side of the median line, and open separately 

 into the terminal part of the median egg-canal, which shows no 

 sign of an accessory vesicle. The canal proceeds forward and then 

 suddenly makes a downward turn to become the shell-gland 

 passage, which opens to the exterior without forming a vagina 

 bulbosa. 



3. Stylocltus ijiituti. n. sp. 



(PL II., fig. 8.— Textfigs. 3-5). 



Numerous specimens of this new species were collected be- 

 tween the tide-marks in the neighbourhood of Enoura in Prov. 

 Suruga. 



Body broadly elliptical, leaf-like but rather thick and of a firm 

 consistence, reaching 50 mm. in length and 30 mm. in breadth. 



( rround colour of dorsal surface deeply huffy, dotted more or 

 less uniformly with minute purplish gray pigment spots. Medianly 

 in the region of pharynx there exists a deep brownish purple band, 

 which fades away laterally. Ventral surface much paler, unpigment- 

 ed, revealing pharynx and reproductive system as whitish spaces. 



Nuchal tentacles slenderly conical, of a dark brown colour, 

 situated at a distance of about- 9 mm. from the anterior body 

 margin, and 3 mm. apart from each other. 



