Bathytoma engonia is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

(Original description) The fusiform shell is biconical, with an expressed rounded keel angulating the whorls, and a broad prominent lopsided beak.

The teleoconch contains 8 broad, short whorls that are regularly increasing, the last rather large, with a sloping slightly concave shoulder, straight below the keel.

The outer lip regularly curved, thin and sharp, with an open V-shaped sinus at the shoulder, rounded at the angle.

The inner lip is polished and porcellanous, rather broadly excavated in the substance of the shell; scarcely convex on the parietal wall, very slightly concave at the junction with the columella.