The Spango Granite mass lies between Crawick Water, Duneaton Water, Spango Hill, and Mount Stewart, in Lanarkshire. The exact outline of its boundaries cannot be traced, as the surface is so much covered by peat-mosses that the rock itself is exposed at few places, and it presents neither peaks nor hill-crags to pierce the covering (fig. 1). At no part of the area did I find the ground clear enough from vegetation and debris to allow of an examination of the junction of the granite with the adjacent rocks. On the eastern side it must be about 200 yards east of where Fingland burn joins Spango Water, 923 feet above sea-level, and the lowest level at which the granite is seen in situ. Here a large outcrop of grey “slate,” not unlike some of the Arran slate, is seen, partly in place close to the granite, but mostly as detached boulders on the lower slope of Fingland Rig, where thin veins of fine-grained granite pass through the slate. A little way west of the slate outcrop the granite is exposed to some extent in position, but mostly as a great mass of blocks, on the hillside, where several springs of water issue from it. There is also a considerable outcrop of the granite, both reddish and greyish, between the slate outcrop and the mouth of Fingland burn. This burn and the gills running into it are good places to study the effects of weathering on the granite. In a side This 250-word extract was created in the absence of an abstract