The whole report is separated into two parts. The first part deals with the threshing results in the eastern Mediterranean (Expeditions I-IV, 1890-1893), while the second those in the Adriatic (Expedition V, 1894). Each part is preceded by a list of the stations that have delivered molluscs, with a precise explanation of the geographical location, habitat, depth and date of the sampling event. This historical paper is digitised through a Citizen Science Workshop organised by the Hellenic Centre in Marine Research in Lecce, 15 November 2023, using the Zooniverse platform.