Shell 18-20 mm in length (holotype 18 mm in length). Fusiform; spire ca. 60% of total length. Protoconch worn, conical, of ca. 2.25 smooth whorls with evidence of keel at periphery. Teleoconch of 6.5 whorls. Teleoconch whorls sculptured with narrow, widely spaced, flat, spiral cords separated by wide intervals, ca. 17 on last whorl, interspaces with single, fine, 2° spiral thread. Axial sculpture of widely spaced, low, rounded ribs, ca. 19 on last whorl (excluding varix) and ca. 17 on penultimate whorl. Varices well-developed, about one varix every 1/3-1/4 whorl except for last whorl. Terminal varix low, wide, crossed by numerous axial ribs. Intersections of axial and spiral sculpture form pustulose, rachet-like sculpture. Aperture elongate-oval, with one plication anteriorly; anal canal set oil by two denticles. Outer lip with ca. 16 lirae deep within mouth, with intercalated 2nd ones. Columella continuous; parietal lip adherent to previous whorl. Siphonal canal short, open. "Stromboid notch" small and shallow. Holotype somewhat bleached and worn, colored white; paratype in the Petuch collection apparently retains some color as Petuch (2002: 63) stated "color pale tan with 3 darker tan bands and with spire whorls being darker tan." Aperture white. Radula. operculum, and anatomy unknown.

he type is a slightly worn, bleached specimen. It is similar to A. chazaliei, but more elongate and with liner sculpture. The collection of additional material may eventually necessitate the synonymizing of A. bahamasensis with A. chazaliei.

Type Locality: Off Victory Cay, Bimini Chain, Bahamas.
Known only from the type locality. Both found specimens appear to be dead shells. Although the type locality did not include a bathymetric range, in the discussion of the species is included the statement "depths of 35 m." Substrate unknown.