Plicifusus incisus: Shell of moderate size, whitish, with a yellowish-brown periostracum and about seven well-rounded rapidly increasing whorls, the nucleus eroded; suture distinct, deep; axial sculpture of numerous retractively arcuate small plications with subequal interspaces, extending from suture to suture, but becoming obsolete on the last part of the last whorl; the incremental lines evident but not conspicuous; spiral sculpture of (on the penultimate whorl about 8) flattish pairs of spirals divided by a shallow groove and the pairs separated by deeper, narrower, somewhat channeled grooves; between these and the preceding suture is a narrow band of closer threads; the former sculpture extends to the canal with much uniformity ; aperture rather wide, the outer lip arcuate thin simple; the body with a thin layer of callus; the pillar straight; the canal short, wide, recurved ; operculum normal, with a glazed border on the inner side. Height of shell, 38; of last whorl, 26; of aperture, 19; diameter, 18 mm. (Dall.)
TYPE in United States National Museum, No. 225614. Type locality, United States Fish Commission Station 3643, western Bering Sea.
RANGE. Arctic Ocean to Bering Sea to Shumagin Islands.