Our esteemed President having been so kind as to ask me to exhibit a series of flints from the Cromer Forest Bed and the Admiralty Section, perhaps the following remarks may be permitted.

The Cromer Forest series exhibit the characteristic surface and somatic alterations which become of great value in identifying these tertiary things when found in derived positions. The peculiar brown, comparable to café au lait, with varying quantities of the milk into which a small, varying quantity of permanganate of potash has been dropped, is well seen in many, as in No. 1. Not that the amethystine blush, which is seen associated with so many hues, even in the lyditised black ones, was due to this salt, but rather to Mn O2. Opalisation is very frequently present, even after other metamorphic processes have been in operation, giving rise to the curdy appearance also seen in No. 1, which, in this case, has supervened limonetic jasperisation.