Swainsonia fuscaSwainsonia fusca, common name : the dusky mitre, is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.DescriptionThe shell is nearly spindle-shaped, entirely brown and marked by bands of punctured dots. Size varies between 14 mm and 30 mm.DistributionThis species is distributed in the Red Sea, in the Indian Ocean off Mozambique, Mauritius and the Mascarene Basin and in the Atlantic Ocean along Angola.