Oenopota sixta: Shell small, white, with a pale, olivaceous periostracum, of five or more whorls (apex eroded); suture distinct; anal fasciole slightly excavated, sloping to a shoulder; axial sculpture of (on the last whorl about 20) narrow, rounded ribs with subequal interspaces, obsolete on the base, slightly nodulose on the shoulder, supplemented by fine, regular, almost microscopic, incremental lines; spiral sculpture hardly visible on the ribs, of feeble threads with wider, flat interspaces, most evident toward the canal; aperture simple, inner lip erased, canal straight. Height of shell, 8; of last whorl, 6; diameter, 3.5 mm. (Dall.)

Oenopota galgana: Shell white, under a yellowish periostracum, of six or more obtusely shouldered whorls, the apex decorticated, the suture appressed; axial sculpture on the earlier whorls of about 18 protractively oblique rounded ribs, slightly angulated at the shoulder, feeble on the fasciole and crossing the whorls except on the last whorl where they gradually become obsolete; the whole surface is spirally sculptured with fine close-set threads; here and there one a little more prominent than the rest, others near the canal coarser; anal sulcus wide and shallow; outer lip arcuate, inner lip erased; canal moderately long, slightly recurved. Height of shell, 15; of last whorl, 11; diameter, 6 mm. (Dall.) NOT FIGURED.
TYPE in United States National Museum, No. 214173.

O. elegans
Shell fusiform, rounded, snow-white, very smooth; 7 whorls obsoletely angulate next the suture, longitudinally very finely striate, transversely costulate; acuminate spire.

Oenopota sixta: USA: Off San Diego, California

Oenopota galgana: Unalaska, Aleutian Islands, in 351 fathoms.

RANGE. Blizhni Islands to St. Lawrence Island, Bering Sea. Circumboreal. Also Norway.