Shell fusiform, much attenuated above, very solid and strong; pale yellow, somewhat glossy, closely and finely striate. Whorls 9, the first quite small, the rest convex, the last whorl somewhat flattened. The aperture is ovate and projects shortly free; peristome white, reflexed and thickened within. The superior lamella is marginal, low and oblique, continuous with the spiral lamella, which penetrates to a point above the sinulus. The inferior lamella recedes deeply, is straight and oblique within, and thickened at the lower end. It does not penetrate quite so far as the spiral lamella. The subcolumellar lamella is deeply immersed. The principal plica is dorsal and lateral, approaching the lip. There is an oblique series of about 5 small, slender palatal plicse situated upon a low ridge.
Length 14.3, diam. 3.4 mm.
Length 13, diam. 3.3 mm.
Length 11, diam. 3 mm.
The clausilium is narrow, the distal half tapering to the rounded apex. It is moderately excised on the columellar side of the filament.
A small, solid, pale species, not closely related to any form I have seen. The several palatal plicae stand upon a low callous ridge. There is a good deal of variation in size.
Shimo-Koshikijima, Satsuma. Types No. 87,604, A. N. S. P., from No. 1,239 of Mr. Hirase's collection.