H8 



T. IWAKAWA. 



of distribution in Middle Japan and also in the south-western provinces, 

 where it probably also occui's. 



31 Paladina ox y trop is, Benson. 



After disposing of the two species above noticed, the rest of my 

 specimens offered some difficulties in being identified. While some of 

 these were referable to oxytropis (after KoBELT), others to Frauexfeld's 

 species Sciatevi and still others to v. MARTENS' japonica, there were. many 

 w ith intermediate characters. After all I have come to the conclusion tbat 

 japonica and Sciatevi must be regarded merely as varieties of oxytropis. 



Typical Pal. oxytropis (fig. 1'2) bas the shape of a double cone. Spire 

 usually acutely pointed, consisting of li or 7 whorls ; shell thin and trans- 

 lucent, upper whorls only slightly swollen or nearly flat, separated by 

 narrow and shallow sutures ; each whorl provided with three or four dis- 

 tinct raised lines, of which the lowest runs at the suturai line, while the re- 

 maining lines run so as to divide the whorl-surface into a corresponding 

 number of zones, usually nearly equal, but sometimes unequal in width. 

 The middle portion of the body-whorl forms a distinct angular ridge, 

 below which there are numerous spiral lines converging towards the 

 umbilicus. Aperture oval but more or less acutely angular above and 

 below ; peristome thin and sharp, its portion at the lower end of 

 columella alone being a little turned out ; all the extremities of raised 

 lines form more or less acute angles at the margin of outer lip. 



Pal. oxytropis var. japonica (fig. 17) [=Pal. japonica, v. Mart.) 

 differs from typical oxytropis in the following characters : shell ovoid- 

 conical, moderately thick and opaque, usually with somewhat obtusely 

 pointed spire ; whorls swollen, separated by wide and deep sutures ; 

 raised lines indistinct or absent except one on the body-whorl, where 

 it makes a very slight angular ridge. Aperture nearly round, with an 

 obtuse angle only at the upper end, and with thick peristome, which is 

 considerably expanded outwards and downwards. 



