Shell small, umbilicated, turbinated, rather thin. Sculpture consisting of irregular, membranaceous radiate threads, extending to the umbilicus ; there is no trace of spiral sculpture. Colour rufous to light brown. Epidermis rather thick, opaque. Spire conoidal, outlines straight, of about the same height as the aperture. Protoconch of 2 whorls, papillate, dark brown, smooth, and shining. Whorls 5 to 5,5 convex, the first 3 slowly, the others more rapidly increasing ; base flatly convex. Suture well impressed. Aperture oblique, ovately rotund. Peristome continuous over the parietal wall, mostly sharp, but sometimes double, the outer one membranaceous and narrowly expanded, with a slight notch at the suture ; callous inside. Columella oblique, arcuate, slightly callous, not reflexed. Umbilicus narrow, open, deep, about one-seventh of the major diameter of the shell. Operculum horny, thin, of few whorls.
Diameter: Maj., 5 mm. ; min. 4,6 mm. : height, 4 mm. : aperture height, 2,6 mm. Almost all the specimens I found were a little smaller. Animal with a distinct posterior glandular notch.
New Zealand: North Island : Near Wellington ; Forty-mile Bush. South Island : Wairoa Gorge ; Kenepuru Sound. This rare shell is living in moist places of the bush, sometimes inside rotten logs.