502 PROCEEDINGS OF THE ACADEMY OF [August, 



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

 Length 9.3, diam. 2.4 mm. 



Tane-ga-shima (Mr. Y. Hirase, No. 663;. 



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

 and plicae 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 (Stereophaedusa) 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 8J. 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 plicae between them. Length 21^, diam. 6 mm. 



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



Specimens from Tane-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 9J whorls (No. 661 of Mr. Hirase's collection). 



There is also a well-marked variety found on 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. Mart, 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 plicae, not present in 

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

 geographically from Addisoni. I think therefore that the latter 

 will stand as a distinct species. 





