Shell fusiform, whitish, with six or more slightly rounded whorls exclusive of the (lost) nucleus; suture distinct, not appressed or channelled; but rather deep; the first three or four whorls are feebly axially plicate, the obscure riblets anteriorly protractive and varying in number up to ten; very faint irregular traces of them, or some of them, may appear on the last whorl; spiral sculpture of numerous straplike flat spirals made duplex by a medial groove and separated by ,a much narrower interspace crossed by fine incremental lines; canal short, slightly recurved; outer lip arcuate, somewhat produced below the periphery; body and pillar with a coating of enamel; pillar attenuated in front, nearly straight. Length of (decollate) specimen 52; of last whorl 39; of aperture 26; max. diameter 22 mm.

The species is perhaps nearest to P. esychus Dall, from the same region, in which the spire is proportionately longer, the whorls more inflated, and the spiral sculpture less coarse.

Point Barrow sandspit, Alaska. Also collected at Icy Cape, Alaska.