Shell small, subfusiform, solid, polished, grayish white, with five or more whorls; suture distinct, the whorl in front of it somewhat excavated and appressed; spiral sculpture present only on the base, when it is faint, and on the pillar, where it is coarser, and composed of obscure close-set spiral threads; transverse sculpture near the apex of a few wrinkles, which are visible on the upper part of the anal fasciole, beginning at the suture, but these do not persist; the lines of growth are not generally perceptible without a glass; on the shoulder of the whorl are (on the last whorl about 17) numerous short oblique riblets with equal or wider Interspaces, little raised, almost like nodules on the last whorl, but near the apex of the spire they are straighter, and extend from the anterior border of the fasciole to the suture, gradually becoming feebler as the shell grows; aperture rather narrow, the anal notch quite deep, reaching the suture above, while the lip below is produced forward; the pillar is stout and strong, the canal straight and rather shallow; length of (decollate) shell, 13; diameter of the last whorl at the posterior angle of the aperture, 5; length of last whorl, 10 mm.

This shell recalls P. chariessa Watson, but is much smaller and relatively much more solid: the wrinkled subsutural band is absent and the shell is smoother. P. chariessa is an Atlantic species, as far as yet known. The single specimen obtained is somewhat broken; the form of the outer lip is described above from the lines of growth. The nucleus and probably a whorl or two more have been lost from the tip of the spire.