The genera vermium exemplified by various specimens of the animals contained in the orders of the Intestina et Mollusca Linnaei :.
London :Printed for the author by James Dixwell ..., and sold by John Sewell ..., B. White and Son ..., and P. Elmsley ...,1783-1788..
biodiversitylibrary.org/page/29389764
Description: Deutsch: Violetter Seeigel im Staatlichen Museum für Naturkunde in Karlsruhe.English: Purple sea urchin in a museum in Karlsruhe, Germany. Date: 24 January 2015, 11:04:53. Source: Own work. Author: MartinThoma.