Retidrillia pruina

Spiral sculpture—the whorls are bisected by a strong angular keel, sparsely, but regularly, set with small round knobs, from which the longitudinal ribs descend.

They rise to a flattened top, consisting of fully 1½ whorls, in the midst of which lies the very minute and immersed tip.

The body whorl contracts from the keel downwards, with a convexly conical and very unequally-sided base, produced into a small bluntly pointed snout.

The outer lip leaves the body at a right angle, and advances direct to the keel, from which point to the end of the snout it forms almost a straight line.

The inner lip is excavated somewhat deeply and flatly into the thickness of the shell, and runs on to the extreme point of the rather short and oblique columella, whose inner edge has a long gradual twist.

[2] This species occurs in the Northwest Atlantic Ocean found at depths between 878 m and 2359 m off the Azores and Massachusetts, USA; in the Gulf of Mexico.