During more than forty years the uncommon arrangement of the strata about Harrogate has attracted my attention, and I have made frequent examinations of the surrounding country to learn the peculiarities of structure of the Upper Palæozoic rocks which are there exposed. Of late years the information furnished by many quarries has been increased by the cuttings on the North-Eastern Railway, and thus not only the ranges of Millstone-grit, calcareous roadstone, and Yoredale shales have been settled, but some light has been thrown on the relation of the Permian grits to those of the older series, which was formerly doubtful. The mineral springs are also much more surely referable to a deep source along an axis of movement than was possible when, now almost thirty years since, I published my map of the north-western tract of Yorkshire*. Founded on a mass of particular notices, I propose now to offer to the Society a few results relating to this district, such as it may be well to consider before the closer scrutiny of the Geological Survey shall have completely mapped out and measured the whole of the large region of elevated Mountain-limestone, Millstone-grit, and Coal-measures of the North and West Ridings. On the map of this part of Yorkshire, and further to the west, the whole country south of the Craven fault, for a length (E. to W.) of fifty miles and a breadth of twenty, is marked by many nearly parallel anticlinals, by which the Great Scar limestone and the