Shell minute, slender, white or yellowish, thin, with an inflated smooth nucleus of a whorl and a half and about three subsequent whorls; suture distinct, not appressed; whorls moderately rounded, smooth except for very fine regular incremental lines only visible with a lens; there are very faint spiral striae on the base and back of the canal; aperture sublimate, outer lip thin, simple, body enameled, pillar straight, canal distinct, slightly recurved; axis minutely or not at all pervious. Length of shell, 5; of aperture, 2; diameter, 2 mm. U.S. Nat. Mus. Cat. No. 108001.
Off Fernandina, about 20 specimens.
Similar to A. pura but with rounder, thinner, and more translucent whorls, and somewhat more elevated spire.