Buccinum physematum: Female shell rather large, thin, inflated, acute, whitish, whorls rapidly enlarging, about six and a half in number, the nucleus decorticated, the suture deep, not channeled; spiral sculpture of very numerous somewhat irregular, fine threads, mostly with narrower interspaces and with little or no tendency to fasciculation, an angle at the margin of the base; penultimate whorl with about sixteen, narrow, retractively arcuate ribs, extending from suture to suture with wider interspaces but obsolete on the last whorl; aperture wide, cream-colored, the outer lip thin, arcuate, reflected, the body erased, the pillar short, slightly twisted, with a wide, very short canal and moderate fasciole. Height of shell, 60; of last whorl, 47; diameter, 40 mm. (Dall.)
TYPE in United States National Museum, No. 122555. Type locality, United States Fish Commission Station 3253, in Bering Sea.
RANGE. Bernard Harbor, Arctic coast, to Point Barrow and Bristol Bay, Alaska.

Shell ovate, conical, solid, white, very closely and wavedly spirally striated; upper whorls fluted, distantly and strongly plaited, the last angular, and the middle strongly plaited, like the upper whorl behind, and plain in front, the plait ending in a prominent tubercle. (Gray.) Long., 55 mm. (Oldroyd.)
TYPE in British Museum? Type locality, Icy Cape, Arctic. RANGE. Bernard Harbor, Arctic coast, to Point Barrow and vicinity of Bering Strait.

Buccinum physematum: Arctic Russia. Bering Sea.