468 PROCEEDINGS OF THE ACADEMY OF [JuIy, 



hachijoensis, which it resembles iu size aud 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 

 YTJde is a little tapering below, aud less thickened at the apex thau 

 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. Hunfjerjordiana. 



Shell with the ordinary slender contour and piriform aperture of 

 Eupluulusa. Superior lamella wanting, or represented merely by 

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

 strongly developed. Lunella subobsolete or wanting; palatal plicte 

 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 MoUendorff, Journ. Asiatic Soc. of Bengal, LI, Ft. 2, No. 1, p. 

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



The specimen figured is fi'om Hungerford's collection, and is 

 DOW 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 striie becoming coai-ser 

 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 immei-sed. 

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

 upper aud lower palatal plicpe 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, tig. 6. 



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

 figs. 26-29. 



The specimen here figured has the inferior lamella more receding 

 than in the tyj^, and the shell is variegated with white. 



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



