Aoteadrillia bulbacea is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.

Below the sinus area and about one third down the whorl from the suture arise, not quite abruptly, longitudinal ribs slightly tubercled at the top, straight, direct, narrow, and parted by shallow furrows about twice their breadth.

Marginating the suture at the top of each whorl is a narrow scarcely swollen spiral band.

Below this the sinus area is very finely, almost microscopically, scratched; and this scratch-sculpture is continued, though less distinctly, on the rest of the surface.

The body whorl contracts slightly from the keel to the edge of the base, and from that point rapidly to the small, narrow, straight, and direct snout.

The aperture is narrowly oval, pointed above, with an oblique, short, rather open and gradually contracted siphonal canal in front.

The outer lip is a rather depressed convex curve, a little concave at the top and flattened toward the point: on leaving the body it retreats at once, forming a shallow, blunt V-shaped sinus, from the lower side of which, with little of angulation, it advances very straight to the edge of the siphonal canal, whence it slowly curves backward round the open point of the snout.