Description: Shell large sized as Margarites with relatively low spire. Protoconch carries 1.5 volutions and relatively small sized. Teleoconch has 3 volutions. Shoulder not angulated and suture not deep. Spiral ridges many, fine and weak. Umbilicus deep and small. Aperture large with thick inner lip. Inner surface unlustrous, light pinkish white to greyish white. Nacreous layer much lustrous while surface layer very thin, pinkish white to greyish white,
Holotype: Shell 25.4mm wide and 20.8mm high, stored in the writer's collection, presented by CHIANG.
Locality: South China Sea, gained by fisheries in Kaoshung, Taiwan.
Remarks: In general outline, colour pattern and spiral ridges, M. (P.) pupillus GOULD is well liked but is distinct by smaller size, relatively higher spire, deeper suture and by less or stronger spiral ridges. M. (P.) sordida (HANCOCK) and M. cinerea COUTHOUY are separated by much higher spire and less spiral ridges. M. groenlandicus CHEM. may be near this species in general outline and spiral ridges but is distinct by thinner shell and less spiral ridges. In shell structure and large size this species may be unique among MARGARITES.