1901.] NATUKAL SCIENCES OF PHILADELPHIA. 501 



Clausilia ptychocyma n. sp. 



Obesely fusiform, nearly smooth except the last whorl, which 

 has a wave-like ridge aud several strong wrinkles behind the lip. 

 Whorls about 8-|. Aperture squarish-ovate, the peristome thick, 

 narrowly reflexed. Superior lamella small and obtuse. Inferior 

 lamella very deeply receding. Subcolumellar lamella immersed. 

 Lunella very low, narrow, straight above, curved inward and 

 meeting the outer end of a short lower palatal plica below. 

 Length 11, diam. 3 mm. 



Tane-ga-shima (Mr. Y. Hirase, No. 6()4a). 



Clausilia ptychocyma var. yakushimae nov. 



Wrinkles on the latter part of the last whorl more numerous 

 aud less prominent; superior lamella often subobsolete; subcolu- 

 mellar lamella less deeply immersed, or emerging. Lunella more 

 distinct. 



Yakushima (Mr. Y. Hirase, No. 6646). 



The following species belong to another group of Ilemiphcedusa, 

 characterized by the very strongly spiral inferior lamella. 



Clausilia entospira n. sp. 



Fusiform, rather slender, yellowish, smooth, the latter half of 

 last whoii coarsely striate, whorls about 8i, moderately convex. 

 Aperture small; peristome narrowly reflexed, very much thick- 

 ened, flattened. Superior lamella small, remote from the spiral 

 lamella. Inferior lamella forming a prominent, heavy fold rather 

 deep within the mouth, strongly spiral within the last whorl. 

 Subcolumellar lamella immersed. Lunella very strong, strongly 

 curved inward below, straight, above. No palatal plicae except the 

 principal plica. Length 10, diam. 2^ mm. 



Tane-ga-shima, 

 Clausilia pinto n. sp. 



Shell small, fusiform, dull brownish-olive, nearly smooth. 

 Whorls 8, moderately convex. Aperture small, squarish-ovate; 

 peristome thick, expanded, subreflexed. Superior lamella small, 

 vertical, marginal, barely continuous with the spiral lamella. In- 

 ferior lamella very deeply receding, straightened within the last 

 whorl. Subcolumellar lamella emerging. Lunella connected 

 above with the middle of a short upper palatal plica, strongly 



