LONDON. Geological Society, June 9.—W. D. Lang: Naos pagoda (Salter): the type of a new genus of Silurian corals. The detailed structure of the hitherto overlooked species Ptychophyllum pagoda Salter is described; it is intermediate between Ptychophyllum,and Chonophyllum (in their proper interpretation), and the new generic name Naos is proposed.—J. F. oJackson: The junction-bed of the Middle and Upper Lias on the Dorset coast. Deposits of Harpoceratoides hemera have been traced throughout the ‘Western Cliffs’ and a richly-fossiliferous representative of part of the ‘transition-bed’ of the Midlands has been found at Doghus Cliff. A compact limestone crowded with well-preserved fossils in the marlstone at Thorncombe Beacon appears to be transitional from the sandy clay below the junction-bed, but it is probably a case of pseudo-sequence due to deposition on a sea-bottom of incoherent materials. The strata at Watton Cliff were measured and photographed in situ. All the evidence indicates slow accumulation under perfectly tranquil conditions. The massive lithographic limestones contain re-deposited matter, and were formed under much less tranquil conditions.—P. G. H. Boswell: A contribution to the geology of the eastern part of the Denbighshire moors. The eastern part of the area, about 72 square miles in extent, between Llanefydd, Denbigh, Ruthin, and the centre of the moors is discussed. The greater part of the area consists of Upper Salopian strata, comprising rocks belonging to the zones of Monograptus nilssoni, M. scanicus, and M. tumescens, but the succession is much obscured by a thick mantle of glacial drift. The sediments are all of shallow-water facies, increasing in coarseness as they become younger, and this is attributed to the filling-up and shallowing of the geosyncline. Tectonically, the area constitutes the north-eastern part of the syncline of the Denbighshire moors, pitching north-eastwards. The dominant faults are of north-and-south trend, but swing north-northwestwards in the northern part, and apparently south-south-westwards south of the district. The structure is interpreted as the result of successive upthrows towards the west, but some lateral movement is probable. Numerous cross-faults, usually antedating the north-and-south faults, carve the country into blocks. While much of the faulting is of pre-Carboniferous age and related to the folding, movement on the north-and-south faults was, at least in part, renewed in post-Carboniferous times.