Glyphostoma polynesiensis is a species of sea snail, a marine gastropod mollusk in the family Clathurellidae.
Glyphostoma polynesiensis Wikipedia
The whorls are narrowly obtusely shouldered, longitudinally closely ribbed, transversely striated. The outer lip is thickened. The anal sinus is large. The color of the shell is white.
This marine species occurs along Lord Hood Island in Western Australia.