Height 9 mm, apertural diamater 15 × 14 mm. Shell small, cap-shaped, with posteriorly situated apex that slightly exceeds posterior rim of the aperture. Protoconch vitreous, dextral. Teleoconch white, with no sculpture except irregular growth lines. Surface covered with dirty yellowish periostracum particularly in marginal area. Interior white. Attached to the shell surface of Onustus and Poirieria.
Distribution:
Northwestern Atlantic including Bermuda and off Suriname.
Remarks:
Northern specimens grows as big as 5 cm in diameter, but Abbott (1974) describes that specimens from the Gulf of Mexico are less than 10 mm. The present specimens agree with the latter.