On the main points of Structure and the probable Age of the Bagshot Sands, and on their presumed equivalents in Hampshire and France

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Abstract
In continuation of the paper I had the honour of reading before the Society on the 3rd of February last, I purpose now to examine another division of the Eocene series, frequently incumbent upon the London clay in the neighbourhood of London, and commonly termed the “ Bagshot Sands .” Forming usually barren sandy districts, and rising, over great part of their area, into ranges of heath-covered hills, the Bagshot sands have attracted but little attention, having, although so near London, remained comparatively unexplored since Mr. Warburton described them in 1821*. Without any permanent natural sections, and with few artificial ones beyond an occasional sand or clay-pit, and the curious grave-shaped excavations often scattered over the surface of the gravelly heaths on some the hills, where they are formed in the process of digging out of the sands the occasional masses of conretionary sandstone, the almost only opportunities for studying the structue of the Bagshot sands are afforded by fresh roadside sections and railway cuttings. The fossils are as rare as the sections. The three genera† (for the species were not distinguishable) of testacea found by Mr. Warburton at Chobham; and the subsequent notice by Dr. Buckland in 1838 of the remains of fishes (including the determination of three new genera) at Goldsworthy, near Woking, comprise I believe all‡ at present known of the palæontology of the Bagshot sands§. Notwithstanding however the scantiness of their recent flora and the poverty of their ancient fauna, the Bagshot sands present many features of much

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