42 



PROCEEDINGS OF THE ACADEMY OF 



[March, 



A thin, fragile shell, with large aperture and densely, minutely 

 granose-scaly sculpture. In fully adult shells the granulation is more 

 or less worn from the apical and early whorls, and on the last whorl the 

 long granules appear to be glossy, but hardly if at all raised above the 

 dull surface. The generic position of this snail is uncertain, but it has 

 the shell characters of Trichochloritis rather than of any group known 

 anatomically to belong to Eulota. 



PaPILLID^. 

 Hypselostoma (Boysidia) hangohowensis P. and H., n. sp. 



The shell is high-conic, with obtuse apex and convex base, minutely 

 perforate, with a long curved umbilical rimation, dark brown. The 

 spire is straightly conic, composed of 5^ 

 convex whorls. The last whorl ascends 

 slowly to the aperture, its latter part being 

 straightened and built forward to the level 

 of the ventral face of the shell. There is no 

 crest or marked constriction behind the lip. 

 The aperture is truncate-oval, the upper mar- 

 gin straight. Peristome thin, well expanded, 

 continuous; with a shallow dent outside at 

 the upper third of the outer lip. The angular 

 and parietal lamellae are concrescent into one 

 stout straight lamella reaching to the margin, 

 wider in the middle of its length, where it 

 shows traces of its dual composition. The 

 columellar lamella is strong, slopes obliquely downward as it enters, 

 and the outer end reaches to, but not upon, the expansion of the hp. 

 There are two short palatal plicae, the lower one somewhat more deeply 

 placed. 



Alt. 2.9, diam. 1.8 mm.; largest axis of aperture 1.3 mm. 

 Hangchow, province Che-kiang, China. Type No. 94,743 A. N. S. 

 P., from Mr. Hirase. 



Compared with H. (Boysidia) hunana Gredler, this is a much smaller 

 shell, with only two palatal plicae instead of three, and the angulo- 

 parietal lamella is less distinctly bifid, as seen in an obliquely basal 

 view. It is not closely related to other described species. 



H. hangchowensis was found with Bifidaria {Bensonella) plicidens 

 (Bens.), a species not before reported from China, but found in the 

 Ryukyu Islands, as well as in subhimalayan India. 



H. hunana as described and figured by Gredler has the last whorl 



H. hangchowensis. 



