These are marine gastropod mollusks in the superfamily Cypraeoidea, the cowries and cowry allies. The ornaments are made of cowries and conch shells. Colemani shrimps, Bobbit worms, cowries and nudibranch (563 species already identified). The shells of cowries are usually smooth and shiny and more or less egg-shaped. Separate records for sinistral (left-handed) shells and obviously rostrate cowries (family Cypraeidae) are also included. Huge amounts of Maldivian cowries were introduced into Africa by slave traders. Western nations, chiefly through the slave trade, introduced huge numbers of Maldivian cowries in Africa. In the 1300s Bengal traded its paddy for cowries from the Maldives. The currency of the Sylhet region was changed from cowries to silver coins. The rich in society had the edges of this dress adorned with beads and cowries. For prasna, 108 cowries are used. The playing order is decided by each player throwing the cowries. However, this study discovers that the number of cowries did not exceed 1000. Faxian mentions that the people used cowries for buying and selling goods. Some species in the family Ovulidae are also often referred to as cowries.