I. Introduction. The following outline of the geology of Prince Charles Foreland, Spitsbergen, is based upon— 1. a number of traverses over the northernmost third of the island and along the west coast as far south as Mount Jessie made by the author during August 1914 as part of the work of the Scottish Spitsbergen Expedition of which he was a member. During the work over the northern part he was accompanied by Mr J. H. Koeppern; in the journey across the island from Richard Lagoon across the St Andrews Peaks to the west coast and along the west coast to Mount Jessie he was accompanied and assisted by Dr W. S. Bruce, leader of the Expedition. 2. A series of rock specimens collected from various parts of the island by Dr Bruce in 1906, 1907, and 1909. I. Introduction. II. Topographic Features. The history of exploration and the topographic features of Prince Charles Foreland have already been described by Dr Bruce,1 who has also published a topographic map of the island on the scale of 1/140,000. This is the map which the author used during his work on the island and the place names mentioned are those which occur upon it: a photographic reproduction of this map, on a slightly reduced scale, is given in Plate XXXVIII. It is only necessary here to describe briefly the main topographic features, as these are an expression of the geological structure. Prince Charles Foreland, about fifty-five