of Aberdeen, at Belhelvie and near Old Meldrum. Where the schists of sedimentary origin have been pierced by these igneous intrusions, they are charged with contact minerals such as sillimanite, cordierite, kyanite and andalusite. Cordierite-bearing rocks occur near Ellon, at the foot of Bennachie, and on the top of the Buck of Cabrach. A banded and mottled calc-silicate hornfels occurring with the limestone at Derry Falls, west-northwest of Braemar, has yielded malacolite, wollastonite, brown idocrase, garnet, sphene and hornblende. A larger list of minerals has been obtained from an exposure of limestone and associated beds in Glen Gairn, about four miles (6 km) above the point where that river joins the Dee. Narrow belts of Old Red Sandstone, resting unconformably on the old platform of slates and schists, have been traced from the north coast at Peterhead by Turriff to Fyvie, and also from Huntly by Gartly to Kildrummy Castle. The strata consist mainly of conglomerates and sandstones, which, at Gartly and at Rhynie, are associated with lenticular bands of andesite indicating contemporaneous volcanic action. Small outliers of conglomerate and sandstone of this age have recently been found in the course of excavations in Aberdeen. The glacial deposits, especially in the belt bordering the coast between Aberdeen and Peterhead, furnish important evidence. The ice moved eastwards off the high ground at the head of the Dee and the Don, while the mass spreading outwards from the Moray Firth invaded the low plateau of Buchan; but at a certain stage there was a marked defection northwards parallel with the coast, as proved by the deposit of red clay north of Aberdeen. At a later date the local glaciers laid down materials on top of the red clay. The committee appointed by the British Association proved that the Greensand, which has yielded a large suite of Cretaceous fossils at Moreseat, in the parish of Cruden, occurs in glacial drift, resting probably on granite. The strata from which the Moreseat fossils were derived are not now found in place in that part of Scotland, but Mr Jukes Brown considers that the horizon of the fossils is that of the lower Greensand of the Isle of Wight or the Aptien stage of France. Chalk flints are widely distributed in the drift between Fyvie and the east coast of Buchan. At Plaidy a patch of clay with Liassic fossils occurs. At several localities between Logie