Franz Anton von Scheidel (Vienna 1731-1801) A study of Shells ( Halbe Flügelschnecken ) inscribed 'Halbe Flügelschnecken/Cochlides semi–alatae./i7.' (upper centre and upper right) graphite, pen and brown ink and watercolour on laid paper, watermark fleur-de-lys on a shield with a crown 49.8 x 35cm (19 5/8 x 13 3/4in). together with a work by the same hand of snakes (2)