22 Art. 4. — T. Kaburaki : 



muscular nature and the free, conical intromittent part lying almost 

 horizontally in its sheath, which communicates with the vesti- 

 hulum, til rough a narrow ciliated passage, at the tip of the conical 

 process. Enclosed in the penis is the seminal vesicle, whicli is 

 provided with a folded wall and continuous posteriorly with the 

 ejaculatory duct, opening into the penis-sheath at the tip of the 

 penis. 



The paired ovary is situated somewhat behind the cerebral 

 mesh work and gives rise to the oviduct on each side, which re- 

 ceives the vitelline glands at numerous points. Behind the genital 

 aperture the oviduct bends mediad, at the same time rising up- 

 wards, to unite with its fellow of the opposite side into a fairly wide 

 common canal, the glanduar organ, which gradually narrows and 

 opens into the vestibulum close behind the opening of the penis- 

 sheath. 



lO. BipalUtni hilfiendorfi. (von Graff). 

 (PI. I., Fic,^ 6.— Text fio-s. 10, 11.) 

 Perocephalus hilgendorß, von Graff (25), p. 415. 



A single specimen of this species, whicli I identity with 

 Perocephalv.^ h'dgendorfl, described by von Gkaff from ' ' Yeddo' ' , 

 an old name of Tokio, was obtained by Mr. Ktnosiuta and the late 

 Mr. Takeshtta in (?)ctober, 19 IG, at Takao near Tokycn 



The head in the preserved state presents a semi-lunar shape 

 and is not a great deal wider than tlie breadtli'of the trunk. 

 There thus exists behind the head a neck-like constriction. The 

 trunk, which is nearly oval in cross section, is almost uniformly 

 broad for the most part, but gradually tapering in the hind parts 

 to the bluntly pointed extremity. From the neck to the extreme 

 posterior is the sole, wliich forms a prominently raised ridge, about 

 one-third the \vi(Uh of the body. The worm in the fully extended 

 state measures 70 nun. in lengtli and '2-5 mm. in breadth. 



The dorsal surface is of a uniform umber brown colour with a 

 yne l>lack line which extends almost throughout the whole length 

 of the body along the median line. Anteriorly tlie line merges 



