The district to which the following notes refer is that which lies between Bagshot, Woking, Aldershot, Farnborough and Ascot. It consists mainly of heath-land, and seems but little known to geologists; in fact, the only authority for the beds included in this area is Professor Prestwich, who, in his paper on the Bagshot Beds [Q.J.G.S. vol. iii. (1847), p. 278], has supplied all the information about the district that is at present known. He divided the beds into an Upper Sandy series, a Middle Clayey series, and a Lower Sandy series. The Middle series he grouped with the Braeklesbantts of the Hampshire basin. The Upper he placed between the Bracklesham and Barton ; our present object is to show that it is more nearly related to the latter.