Description: English: Alder J. & Hancock A. (1845-1855). A monograph of the British nudibranchiate Mollusca: with figures of all the species. The Ray Society, London. Published in 8 parts: Part 5 Fam. 3 Plate 27 [1851]. Eolis aurantiaca Alder & Hancock, 1851 synonym Cuthona gymnota (Couthouy, 1838) accepted name. Date: 1851. Source: https://www.biodiversitylibrary.org/item/131598#page/394/mode/1up. Author: Albany Hancock.