In a paper published in the Philosophical Transactions of the Royal Society (Series B, vol. 209, pp. 329–50, 1920) I described the relationship of the rostro-carinate flint implements of the East Anglian Pliocene deposits, to the later palaeolithic hand-axes, and illustrated my remarks by means of several specimens of transitional form found in various parts of this country. Since this paper appeared I have examined a large number of implements which show, in the clearest manner, the above-mentioned relationship, and this is especially the case with the two specimens described in this note.