times ; as the Roman Amphitheatre, supposed to have been built by Diocletian in the third century, is constructed of this stone; occasionally the forms of the fossil shell (Nummulites), which gives the name to the formation, may be sometimes faintly distinguished amongst the blocks of the Amphitheatre. This marble, in some cases, assumes a brecciated aspect, examples of which may be observed in the porch and internal columns of the Cathedral of Verona; 1 the external walls of which are constructed of alternating courses of marble and brick, with orna mental designs in terra cotta, of the twelfth century. The marble of Verona has been extensively em ployed in the construction of the nobler buildings of Venice. Of this stone are formed the columns and arches of the two colonnades which run along the south and west sides of the Palace of the Doges, dating from the fourteenth century. We also recog nise it in the portal of St. Mark’s, in company with other marbles; the campanile, and the internal flooring of the Accademia delle Belle Arti, and some of the churches. It is scarcely necessary to add that all the stone used in Venice has been brought from long distances. Additional Localities. Other sources of statuary 1 This quaint old structure has a certain celebrity besides its intrinsic merits attached to it, as it contains Titian’s celebrated picture of ‘ The Assumption.’