Figure 3 from: Welter-Schultes F, Görlich A, Lutze A (2016) Sherborn's Index Animalium: New names, systematic errors and availability of names in the light of modern nomenclature. In: Michel E (Ed.) Anchoring Biodiversity Information: From Sherborn to the 21st century and beyond. ZooKeys 550: 173–187. https://doi.org/10.3897/zookeys.550.10041

Figure 3 - Example of a new name established in a chaotically arranged early zoological work. Detail of Hartmann (1821: p. 231), with the original description of Helix ruderata Hartmann, 1821 (currently Discus ruderatus). For the non-insider it is very difficult to see that a new name was established here. It is necessary to understand precisely the content of the German text: "s. meine Tab. II. f. 11. Der vorigen ähnlich, aber aufgeblasener, rauher, weniger Umgänge" (= see my plate II, figure 11. Similar to the previous one, but more inflated, rougher, fewer whorls).