Shell very small, cylindrical, of a dingy white color, very thin and fragile; whorls four, rounded, all lying in the same plane; suture distinct, as seen under the microscope; spire elevated; labrum nearly straight at the posterior part, rounded anteriorly, returning into the shell it forms a delicate, slightly elevated lamina, which, under the miscroscope, is seen to occupy nearly the whole length of the columella region; aperture very narrow posteriorly, broad and rounded anteriorly. Length, .08; breadth, .04 inch. (Mighels.)

Type locality, Casco Bay, Maine.
RANGE. Arctic Ocean; Bering Sea; also Atlantic.