II.—The Lower Carboniferous Problem in Devonshire

What represents the Carboniferous Limestone in Devonshire, is a question that has often been asked, but has never yet been answered in a satisfactory manner. The question has recently been narrowed by the identification of the Coddon Hill Beds and the Posidonomya limestones with the shales, cherts, and limestones which overlie the mass of the Carboniferous Limestone in South Wales, and with the Pendleside Beds which occupy a similar position in Staffordshire, Derbyshire, and South Yorkshire. Dr. W. Hind considers these beds to be more intimately connected with the Upper than with the Lower Carboniferous Series, and in any case the homotaxial equivalent of the main mass of the Carboniferous Limestone must be sought for below them.