THE South Downs of England descend at about eight miles from the sea into beds of clay, diversified by gravel and sand, and with an upper deposit of peaty, boggy soil, all having been brought down by the rivers of which the Itchen and the Test remain. On the western side of the Itchen, exactly at the border where the chalk gives way to the other deposits, lies the ground of which this memoir attempts to speak. It is uneven ground, varied by undulations, with gravelly hills, rising above valleys filled with clay, and both alike favourable to the growth of woods. Fossils of belemnite, cockles (_cardium_), and lamp-shells (_terebratula_) have been found in the chalk, and numerous echini, with …
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