As above stated, the arrangement of the pits on the lower surface of the fringe is not invariably the same as that on the upper surface, and we may now examine the degree of correspondence or difference in the better-known British species.

In the latter part of 1910 I was agreeably surprised upon the examination of some material from the Rhætic Black Shales at Glen Parva, Leicestershire, to detect a specimen which at the moment I recognized as new (specimen A).

The following notes on the laterites of Western Australia are the outcome of a careful study of the series of articles contributed to the Geological Magazine during the latter part of 1911 by Dr. L. Leigh Fermor, entitled “What is Laterite?” These deal with the subject from the point of view of one having an intimate knowledge of Indian laterite, but not a first-hand acquaintance with those of other parts of the world. The present writer, during the last fifteen years, has devoted much time to the study of the laterite of extratropical Western Australia, both in the field and in the laboratory, and is therefore in a position to supplement some of the work of Dr. Fermor, whilst inclined to differ from him in some of his deductions.

In the Carboniferous Limestone of the Crich inlier in Derbyshire, there are numerous clay-bands or partings interbedded with the limestone which appear to throw considerable light on the geological history of the area.

In 1911 Mr. E. J. Wayland, F.G.S., and the authors visited the Portuguese East African province of Mozambique in the interests of the Memba Minerals, Ltd. The country was very little known geographically, and except along the coast, it was a terra incognita to geologists. We hope in due course to publish a detailed account of our observations, but as it will be some time before this can be completed, it seems advisable to give a short résumé of the salient geological features of the territory. It is hoped that these resultswill prove of interest to students of East African geology, especially in their bearing on problems of theoretical interest concerning the geological history of that portion of the globe.

The following preliminary account is presented as the result of several weeks of field-work on the northern and eastern margins of the Forest of Dean Coalfield, carried out partly in 1910 and partly in the present year. The area which I have examined lies almost wholly within Sheet 43 S.E. of the 1 inch Geological Survey Map (Old Series), but extends a short distance into Sheet 43 S.W. In portions of this area, the Lower Carboniferous rocks have been studied in detail and mapped. The Coal Measures, however, have as yet been examined only in their relation to the Lower Carboniferous strata. The present communication is, therefore, confined to a demonstration of the important unconformity which exists between the Coal Measures and the Lower Carboniferous rocks, together with a brief description of the latter. I am continuing my investigations, and I hope to give at some future date a more comprehensive account of the geology of the coalfield. In the meantime, the following outline may be of interest.