Description: English: Genus Purpura, Plate II. Purpura neritoidea, Purpura neritoides Lamarck, Nerita nodosa Linnaeus, synonym of Thais (Thais) nodosa[1]. Date: 1843. Source: Conchologia iconica, or, Illustrations of the shells of molluscous animals (1843). Author: Lovell Augustus Reeve (1814–1865). Permission(Reusing this file): Work is older than 100 years, author has been dead for more than 70 years.