I. I ntroduction . T he object of this paper is to describe the glacial deposits which overlie the Chalk on Flamborough Head, and to show their relation to those of the neighbouring areas north and south of the headland. Though a considerable amount of scattered information respecting these beds has already been published, no systematic or detailed account of the drifts as a whole has yet been carried out. The district is one of peculiar importance for students of the glacial phenomena of our :East coast, since it is at this poinb that the connexion between the drift of the hills and that of the plains must be traced, the coast-line here passing from the low ground of Holderness (an unsubmerged corner of the plain of the North Sea) to the elevated and broken region of the Wolds and Moorlands, and of the North of England generally. And that the nature of this connexion is by no means obvious has been shown in the former attempts to unravel it. The promontory affords almost unparalleled facilities for such an investigation, for with an area of less than sixteen square miles it possesses a precipitous coast-line over fifteen miles in length, presenting magnificent sections in various directions through the thickest part of the drifts; and has, besides, in the interior, three or four miles of railway-cuttings, and chalk pits in abundance. If the glacial history of an area thus laid open cannot be deciphered, there must indeed be slight hope for less favoured localities.