Plicifusus brunneus: Shell small, yellow-brown, sculptured with revolving rounded ridges, separated by incised lines, and by transverse, rather narrow, slightly waved costae, which become obsolete on the periphery of the last whorl. Canal short; aperture lunate or elongate oval; outer lip crenate, rather thin; inner lip smooth. Whorls six, rounded; suture conspicuous with the rounded posterior ends of the costae, rendering it wavy; ridges, eight on the fifth whorl, twice as numerous on the last whorl. Costae, about fourteen on the last whorl. Length, .7 in.; width, .32; canal and aperture, .35 in; spire, .35 in. (Dall.)
TYPE in United States National Museum. Type locality, Nunivak Island, Bering Sea, in 10 fathoms.
RANGE. Port Clarence, Bering Strait, to Nunivak and the Pribilof Islands.