WE regret to have to record that our colleague, Dr. Henry Woodward, died at his home at Bushey, Herts, on 6th September, in his 89th year. He retained his active interest in our work almost until the end, and passed away peacefully in the presence of his family.

Figs. I–VII give a graphic representation of the average silica percentage of a number of igneous rock types, so arranged as to show the relation between silica-percentage and rock nomenclature. All the analyses used were obtained from the 1917 edition of H. S. Washington's Chemical Analyses of Igneous Rocks”. This book contains some 8,000 rock analyses from many parts of the world. They are divided into two classes, superior and inferior. Only those of the former category (some 6,000 in all) have been utilized.

The dyke to be described in this paper has not hitherto been noticed in petrological literature, although the western part has been recorded on the map of the area by the Geological Survey. It exhibits, nevertheless, some interesting features and adds data to our knowledge of the minor intrusions of north-east England.

1. Thirty-six species of Foraminifera are recorded from various localities in the Hartwell Clay and associated beds. 2. The assemblage of species is characterized by:— (a) the abundance of rotulate Cristellarians of Lower Cretaceous type, and of Cristellaria fragraria. (b) the common occurrence of Vaginulina harpa, a Jurassic type. (c) the rarity of arenaceous, and the absence of porcellanous forms. 3. The Foraminifera from the Hartwell Clay are compared with those from other deposits in the Aylesbury district, and with those from foreign deposits of similar age. 4. The relative abundance of glauconite is a point of similarity between the Hartwell Clay and beds hitherto regarded as Kimmeridge Clay.

A Small stream forms the boundary between the Parishes of Wensley and Winster, on the north-west of the former; and here abouts its bed, in the Limestone Shalc; is probably about 30 feet above the Carboniferous limestone. On the Winster side, the shales form a oded slope (Whites Wood) rising 100 feet in about 200 feet, and on this side the shale is quite normal and of the black colour usual in the lower beds of this formation. On the Wensley side the ground rises more gradually, and the actual bank of the stream averages not more than about 10 feet in height. Here, an altered shale is exposed and can be traced (through the activity of moles) in the fields behind.