Study of the Characteristic of Neritidae: Shell and Operculum. [2018]. (1) SUSINTOWATI (2) Prof. Dr. Suwarno Hadisusanto, S.U. (3) Prof. Dr. Nyoman Puniawati Soesilo, S.U. (4) Dr. Erny Poedjirahajoe MP. (5) Prof. Dr. Niken Satuti Nur Handayani, M.Sc.