xxiv Journal of Proceedings. period the whole of the human inhabitants of Europe were using stone exclusively, at another period nothing but bronze, and at another period only iron. As pointed out by Sir John Lubbock, these ages no doubt overlapped, and stone might have been in use in one country at a period when bronze had found its way into a neighbouring country. The remains found in the peat-bogs simply indicated three successive stages of civilisation in one district, but there was no reason whatever for believing that each stage was absolutely contemporaneous with a corresponding stage throughout the whole of Europe. Then there was evidence of another kind furnished by the well-known refuse-heaps or "kitchen-middens" found on the shores of the Baltic, consisting of great mounds of shells which appear to have been cast away as refuse by the people of the Stone Age. In these heaps were found none but stone implements ; they belonged without doubt to the Stone Age, and no metallic weapon of any kind had ever been found in them. Facts of this sort of course went to show that the use of stone preceded that of metal, which required greater skill and knowledge in order to work it, and they further went to support the view that our ancestors were of a more barbarous type than their successors, and not, as is often stated, that man has been degraded from a more civilised state. The Stone Age had been divided into two periods, the Neolithic or Newer Stone Age, and the Palaeolithic or Old Stone Age. The first evidence of man's advent upon the earth, as afforded by these worked flints, according to the generally-received opinion, showed that he appeared about the time of the last glacial epoch which came on at the close of the great Tertiary Period of geologists. Of late years some authorities had stated that worked flints had been found in strata of inter-glacial or possibly of even pre-glacial age. The evidence had been much disputed, but he (the President) was glad to see that Prof. Ramsay, the Director-General of the Geological Survey, in the last edition of his ' Physical Geology and Geography of Great Britain,' had unhesitatingly accepted Mr. S. B. Skertchley's statement that he had found flint implements in brick-earth beneath the Chalky Boulder-Clay near Brandon, in Suffolk. So far as he himself was concerned, the President saw no a priori reason for refusing to accept the evidence of man's enormous antiquity—an antiquity which might extend back to pre-glacial times and even as far back as the Miocene Period. The implements of the Old Stone Age were of a much ruder type than those of the Neolithic Period, but that they were both of human workmanship would not for a moment be doubted by anyone who would examine them fairly and intelligently. Palaeolithic implements were found in association with animals now extinct, and their enormous antiquity was further proved by the great elevations at which the flints were sometimes found above the existing rivers. By means of diagrams drawn on the black-board, Mr. Meldola then showed the manner in which valleys were hollowed-out by river- action, deposits of alluvium and gravel being left at different elevations