This is Tafel XI from an 1889 paper by E. von Martens*. The drawing of the live snail on the bottom represents a Helix asemnis venusta, a species of southwestern Turkey and the nearby Greek Islands.
The previous 19th century painting of terrestrial gastropods was here.
*E. von Martens. 1889. Griechische Mollusken. Archiv für Naturgeschichte 55:169. (Full text from the Biodiversity Heritage Library.)