Agaricus cerussatus Fr. Opinions Dow. t. 162. on old tree, covering becale 20 April 1839. Dundee. Pileus hemispherical at length broadly campanulate, white, over 1 inch in breadth, umbonate, convex, the edges inequaleaf turned and flat: margin inflexed: flesh white. Gills 4 in a lot, snowwhite as well on the minute [illegible], forma elliptical Stem more than 1 inch in height. White externally and internally, Nearly if not altogether solid, livid at the base Odour Scarcely any. Only 2 specimens were found on 20 April 1839. 2 More were found — on the 23 old. No these were larger and the Pileus alone was of a pale slate-blue colour. From the root of the stem it was excavated and filled with an air-vessel as represented in a plate, but much magnified