500 PROCEEDINGS OF THE ACADEMY OF [August, 



nobilis, etc., more attenuated above than any of the known species 

 except C. awajiensis, which is a more obese form with narrow lip 

 and emerging subcolumellar lamella. 



Clausilia ischna n. sp. 



A slender and elongate member of the group of C. awajiensis, 

 the length five times the greatest diameter; rather thin, brown, 

 with about 11^- whorls; finely stri ate. Aperture small, the peri- 

 stome reflexed, rather narrow. Superior lamella compressed, 

 oblique, continuous with the spiral lamella. Inferior lamella very 

 deeply receding. Subcolumellar lamella deeply immersed. Lu- 

 nella curved inward below, straightened above, and connected with 

 a short, oblique upper palatal plica, being shaped like the letter 

 J. Length 16.5, diam. 3 to 3.3 mm. 



Kochi, Tosa (Mr. Y. Hirase, No. 657a). 



More slender than any other known species of the group of C. 

 awajiensis. 



Clausilia ischna var. neptis nov. 



Paler, nearly corneons or whitish; less slender, the last whorl 

 more coarsely striate; peristome broader; sinulus more retracted. 

 Whorls 11. Length 15.5 to 16.5, diam. 3.5 mm. 



Occurred with the preceding. 



Clausilia tanegashimae n. sp. 



Fusiform, rather slender, obsoletely marked with growth-lines, 

 the last whorl striate, pinched up in a rather acute strong wave 

 behind the peristome. Whorls 10J. Aperture ovate, the peri- 

 stome well expanded. Superior lamella small, oblique, marginal. 

 Inferior lamella receding, not visible from in front. Sub- 

 columellar lamella emerging. Lunella curved inward above, 

 straight below, its lower end joined to a lower palatal plica near 

 its inner end. Length 18J, diam. 4J mm. or smaller, length 

 16J- mm. 



Tane-ga-shima (Mr. Y. Hirase, No. 662). 



The HemiphceduscB of the northeastern Loo Choo Islands belong 

 to several groups special to those islands. The group of C. tone- 

 gashimcB has the internal structure of the plicilabris group, but 

 there is a strong wave or crest behind the outer lip parallel with it. 

 The shell is very solid and strong. 



