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Keywords from Image Description:
Die land und ssswasser Conchylien der Vorwelt . Sandber er Landiml StisswConchylien TafMI eez ulfth ScHcrtteibeck Dreissenia subglobsa Bartsch sjv trianqularis Bartsch sjiy sabcariiwtcv zs Uwaeformis Kraass amggdlois Drmh sansx Barbot' Cardiam afiertam Mimst Mdarw zmfiressa Kraass Eeidel's Yerla in Wiesbaden MSanasts