Having had the good fortune to visit Brussels in January last, I availed myself of a few hours' delay to pay my respects to M. E. Dupont, the Director, and M. A. de Borre, the Secretary, of the Museum of Natural History in that city, by whom I was most kindly received and introduced to M. Henri Nyst (whose descriptions of the Tertiary formations of Belgium and tiieir invertebrate fauna have rendered his name familiar to almost every English geologist).

Just out of Seaford the Chalk rises sharply from beneath the sand of the Woolwich Beds, on an outlier of which the small town is buUt. The dip however soon lessens, until the Chalk is flat, with slight waves. Some of the layers of flint are continuous, and some nearly so, but most are not continuous, and they are rather closer together in the lower part of the cliff. There are a few thin beds of hard chalk, and at the top a capping of “clay-with-flints.”

Although the Coalbrook-dale Coal-field has received a large share of the attention of geologists, the progress of mining operations reveals new facts from time to time, enabling us to explain away some of the difficulties which have beset earlier writers.

The fine series of Fossil Fishes in the National collection is exhibited in and constitutes the principal feature of Boom II. in the Northern Geological Gallery. The arrangement adopted is in accordance with the classification of Prof. L. Agassiz, as indicated in his great work, “Recherches sur les Poissons Fossiles,” but with such modifications as the subsequent investigations of ichthyologists have rendered necessary. These modifications occur chiefly among the fishes of the older formations.