Bursa lamarckiiBursa lamarckii is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.DescriptionThe shell size varies between 33 mm and 80 mm.DistributionThis species occurs in the Red Sea and in the central and west Indo-Pacific region; also off the Philippines.EtymologyThe snail is named after Jean-Baptiste Lamarck.