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Denkschriften der MedicinischNaturwissenschaftlichen Gesellschaft zu Jena Taf. XXXI . Jena Ed DISO OMEDU SE TafMI EHaeckeldel Verl LSh AnstvEGiltscUei POLYBO STRICHS Taf XXXI Illustration biodiversitylibrary org Medizinischnaturwissenschaftliche Gesellschaft zu Jena Biodiversity Heritage Library Aquatic Species Favorites