Type locality: Russia, Bering Sea, the Gulf of Oljutor, 59° 06'4 N, 166° 02'7 E, 330-335 m. Range and habitat: Neptunea alabaster is an Arctic species, only known from the western Bering Sea off the Gulf of Oljutor.

Description: Shell of medium size (usually 110-120 mm), thin but solid, snow-white. Subsutural slope broad, concave on upper spire whorls, straight or slightly convex on body whorl. Upper spire whorls sculptured with 2 sharp primary spiral cords, penultimate whorl with 4 strong
primary spiral cords, the fourth one occasionally partly concealed under lower suture, interspaces with alternating broad and finer secondary spiral cords. Outer lip thin, flared, irregular.

Comparison: Neptunea alabaster is a beautiful, snow-white shell, easy to distinguish from other species by the prominent spiral sculpture with alternating secondary spiral cords and rather narrow interspaces. The outer lip is flared, thin, fragile and occasionally rather wrikled.