The choice of N. gibbosulus in Mediterranean sites and N. kraussianus is South African web-sites can be a perform in their availability from the vicinity on the websites, but would not make clear why this genus was chosen in excess of other shells of comparable measurement and form. A comparison https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf