38 A.rfc. 9- — M. Yeri and T. Kaburaki : 



Body oval, with somewhat wavy margin, measuring 35 mm. 

 in length and 15 mm. in breadth . The dorsal surface is slightly 

 raised in the median parts. 



Dorsal surface velvety black, but bordered all round by a 

 russet In-own marginal and a clear yellow submarginal band. 

 Ventral side dark and with marginal bands similar to, but less 

 distinct than, those seen on the dorsal side. 



Marginal tentacles appear as folded Haps of the frontal 

 margin. 



Numerous eye-spots distributed on both dorsal and ventral 

 sides of tentacular Haps. Cerebral eye-spots lying close together 

 in a round clear space over the brain. 



Sucker situated at a point somewhat anterior to the centre of 

 body. Mouth opening into the centre of the pharyngeal sheath 

 placed in the first quarter of body. Main gut extends posteriorly 

 nearly to the hind end of body. 



Male genital apertures open in a pair, one on each side of the 

 median line and close behind the pharyngeal chamber, there being 

 present two sets of male genital end-organs. Seminal canal 

 (textfig. 40, so) of either side swells anteriorly into the seminal 

 vesicle (sv) and gives rise inferiorly to the ejaculatory duct (ed). 

 This pursues a tortuous course and receives at the base of penis 



the duct of the prostate (pr) which 

 is placed anterior to the seminal 

 vesicle. The penis is chitinous, 

 styliform and vertically disposed. 

 The antrum musculinum (am) shows 

 an obliquely dorsally directed 

 annular outbulging just before it 

 opens externally at about the 

 level of penis. The female genital 

 edp £ am aperture is single and medianly 



^AnSSAÎe^t SitUated cl ° Sel * V behind the male 



tai end-organs of Psmdocrro* apertures. The female end-organs 



luteomargtnatus, as seen from l 



therigiitsid... are essentially as in Pseudoceros 



index letters as in teKtfio-. 4. 



superbus L\x<.. 



