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Rh the paper by Mr. Prestwich in the Philosophical Transactions. I will merely add, that he considers that the gravel at St. Acheul closely resembles that on some parts of the Sussex coast, while the beds at the Moulin Quignon are nearly analogous to those near the East Croydon Station, and in many parts of the valley of the Thames.

Of the animals now for the most part extinct, and most of which have hitherto been regarded as having ceased to exist before the appearance of man upon the earth, and the bones of which have been discovered in the drift at Menchecourt, the following may be mentioned on the authority of M. de Perthes' "Antiquités Celtiques et Antédiluviennes," and M. Buteux' "Esquisse Géologique du Département de la Somme:"—

The mammalian remains from St. Acheul, and other places where bones have been found in the drift of the valley of the Somme, represent the same group, though confined to a smaller number of different species in any one locality. At St. Roch the teeth of the hippopotamus have also been recently found. The remains of the same group of animals have been met with in the cave at Brixham, and in that called Kent's Cavern, near Torquay, to which I have already alluded, and are constantly brought to light in the superficial freshwater drift which abounds in many parts of this country. The rhinoceros and mammoth belong to the same species as those whose frozen bodies, still retaining their flesh, skin, and hair, have been discovered beneath the ice-bound soil of Siberia. Both species appear to have been adapted for a far colder climate than their present congeners.

Let us now turn our attention to the flint implements alleged to have been discovered in the drift in company with the remains of what has usually been regarded an older world; and consider, first, how far in material, form, and workmanship they agree with or differ from the stone weapons and implements so commonly found throughout Europe; and then enter upon an examination of the