502 TROCEEDINGS OF THE ACADEMY OF [AugUSt, 



curving'inward at its lower end, being shaped like the letter J. 

 Ivength 9.3, diam. 2.4 mm. 



Tane-ga-shiraa (Mr. Y. Hirase, No. 663 j. 



This species looks like a Zaptyx, but wants the accessory lamellse 

 and plici^e of that group. I am disposed to consider it a degener- 

 ate^member of that subgenus. Otherwise, the receding inferior 

 lamella would cause it to be ranked as a Hemiphcedusa. 



Clausilia (Stereophgedusa) stereoma n. sp. 



Excessively strong, glossy, olive-yellow, weakly striate ; very 

 obese below, the upper third very much attenuated, latter half of 

 the last whorl compressed. "Whorls about 8^. Aperture piri- 

 form, the peristome thickened, narrowly reflexed. Superior 

 lamella rather small, continuous with the spiral lamella; inferior 

 lamella forming a strong, subhorizontal fold; subcolumellar 

 lamella emerging. Principal plica rather short, lateral; upper 

 and lower palatal plicae of moderate length, oblique, two minute 

 palatal plic?e between them. Length 21i, diam. 6 mm. 



Yaku-shima (No. 670 of Mr. Hirase' s collection). 



Specimens from Taue-ga-shima, which may be called var. cog- 

 nata, are referable 'to the same species. They are a little larger, 

 reddish-brown, perceptibly thinner than the types though still very 

 strong, and with 9i whorls (No. 661 of iMr. Hirase's collection). 



There is also a Avell-marked variety found ou Yaku-shima, much 

 smaller, length 14^^ to 17 mm., more slender, but the color of the 

 type. This may be called var. nugax. 



These forms closely resemble C. brevior v. ]\Iart. in the obese 

 contour, very much attenuated above; but they are excessively 

 strong, while brevior is thin. One species of the brevior group 

 occurs in southeastern Kiusiu, C. Addisoni Pils. This was orig- 

 inally described as a variety of C. brevior, but on opening addi- 

 tional specimens I find that there is a more or less distinct, straight 

 lunella between the second and lower palatal plicte, not present in 

 C. brevior. jNIoreover, C. brevior seems to be widely separated 

 geographically from Addisoni. I think therefore that the latter 

 will stand as a distinct species. 



