Shell white, elongate-ovate, moderately elevated, with a blunt polished apex, on which in young specimens, remain traces of the disk-like, chalky, embryonic shell; the slopes from the apex to the ends both convexly arched; margin simple or slightly denticulated by the radiating sculpture; within polished ; scars as in Acmaea; epidermis none; sculpture externally of fine, uniform, rounded, closely set threads, radiating from near the apex to the margin and reticulated by the fine, rather prominent, regular, concentric ridges of growth, both ridges and threads averaging near the margin about three and a half to the millimeter. Length., from end to end, 14,5 mm.; from apex to anterior end 5,5 mm.; lat. 10,0 mm.; alt. 5,5 mm.

Caribbic. Off St. Lucia, 226 fms.; off Dominica, 333 fms.; off Guadelupe, 583 fms.; and off St. Thomas.