468 PROCEEDINGS OF THE ACADEMY OF (.July, 



hachijoensis, which it resembles in size and color. It will be 

 known by the unusually strong superior lamella, emerging sub- 

 columellar lamella and total absence of a lunella, the two palatal 

 folds being small, remote and parallel. The clausilium though 

 wide is a little tapering below, and less thickened at the apex than 

 in most of the related species. 



There is some variation in sculpture, one specimen being densely 

 and rather sharply striate, while the others are smoother. 



Group of C. Hungerfordiana. 



Shell with the ordinary slender contour and piriform aperture of 

 Euphcedusa. Superior lamella wanting, or represented merely by 

 a slight thickening of the lip-edge. Inferior lamella rather 

 strongly developed. Lunella subobsolete or wanting; palatal plicae 

 2; the principal plica short. Shell usually variegated with white 

 streaks. 



This new ' ' Formenkreis ' ' contains two species, both Japanese. 



Clausilia Hungerfordiana Mlldff. PI. XXV, fig. 4. 



Von Mollendorff, Journ. Asiatic Soc. of Bengal, LI, Pfc. 2, No. 1, p. 

 2, PI. 1, fig. 1 (July, 1882). 



The specimen figured is from Hungerford's collection, and is 

 now in that of Mr. E. R. Sykes. It is slender, thin, conspicu- 

 ously streaked and maculate with buff-white on a brown ground. It 

 is finely, rather irregularly striatulate, the striae becoming coarser 

 and distinct on the back of the last whorl. The superior lamella 

 is represented by a slight thickening of the lip-margin. Inferior 

 lamella strong. Subcolumellar lamella very deeply immersed. 

 The lather short principal plica is lateral, the lunella subobsolete, 

 upper and lower palatal plicae being developed. 



Length 12, diam. 2.5 mm. 



Nara, Yamato. 



Thus far known from the type locality only, a town lying east 

 from Osaka, in northern Yamato. 



Clausilia monelasmus Pils. Pi. XXVII, fig. 5. 



Pilsbry, Proc. A. N. S. Phila., 1900, p. 674, PL 24, figs. 4-6 ; PI. 25, 

 figs. 26-29. 



J* The specimen here figured has the inferior lamella more receding 

 than in the type, and the shell is variegated with white. 



It is evident that this is a northern species very closely related 



