Shell minute, white, picked out with streaks of pale brown, or dots, or radiating blotches of bright rose-color. Whorls about three, surface finely shagreened in a granular manner; no radiating sculpture other than incremental lines; spiral sculpture of, on the last whorl, one generally minutely nodulous small spiral rib at the suture, one strong spiral not nodulous near the periphery, another at the periphery, and on the edge of and within the wide umbilicus two or three very strong evenly noduled spirals, the outer forming the border or umbilical carina, the others ascending within the umbilicus, all separated by very deep channels. On the outer surface there are occasionally fainter intercalary spirals. Suture distinct, hardly channelled. Aperture circular, slightly varicose in the adult. Operculum chiefly calcareous, multispiral, concave, with a central perforation when weathered. Max. diam., 2.5; min. diam., 2.0; alt., 2.0 mm.

This pretty little shell has much the general appearance of A. tricarinata on a much smaller scale and with a different umbilicus and details of sculpture.

Habitat. Barbados, in 15 fms. Nassau, N. P., and Samana Bay, Santo Domingo, dead on beach