20 THE ESSEX NATURALIST. in this I found a fine last lower molar of Elephas trogontherii, not the usual E. antiquus of the Clacton channels. There is a deposit of loam on the foreshore below East Mersea church that is the richest bone-bed I have ever seen, but the bones have suffered so much from exposure that they are difficult to extract. There is also an associated gravel here. I have identified Elephas antiquus, Hippopotamus and Rhinoceros, but no trace of the Clactonian industry. The Clactonian Industry.8 The Palaeolithic industry of the Clacton channel was first discovered by the Rev. J. W. Kenworthy in 1898, and our Strat- ford Museum is fortunate in possessing some of his original specimens. The value of these specimens, is however, mainly historical and sentimental, as they are insufficient to give any true idea of the character of the industry. The study of the Clactonian industry has materially contri- buted to the establishment of what I have called the new per- spective in the interpretation of Palaeolithic times, that is to say, to the realization of the view that there were entirely distinct industries, doubtless belonging to equally different human races, each proceeding contemporaneously along its own separate and independent line of evolution. It might well be, for example, that one race would occupy the forests, like the Forest Dwarfs of Africa, and a different but contemporary race the open plains. The most important and characteristic implement of the Clactonian industry is the side-chopper. Its nature is indicated in the outline and cross-section fig. 1, 7. The back, seen at the top of the cross-section, gives a very firm hand-grip, while the segmental cutting edge, which is produced by a small number of bold flakes, is usually furnished with several sharp pointed cusps. It is extremely primitive, but a most practical and efficient instrument. Some authorities regard these "choppers" as being merely cores. To my mind the evidences against this view are :—(1) They are always flaked to produce a segmental edge, that is balanced to the hand-grip ; (2) The flakes struck from them would be rather useless ; (3) The Clacton people were perfectly 8 Formerly called "Mesvinian." Proc. Pre. Soc. E. Anglia, vol. iii., 1922, p. 597.