The cavities or burrows in the Permian Limestone near Wormald Green Station, to which I wish to draw your attention, are of such obscure origin that at one time one is inclined to refer them to the excavations of some early form of Gastrochaena; at another to an annelid; then to one of the algae. Without attempting to say what they really are, I venture only to describe their forms and their position in the limestone, and what I have been able to gather from the observations of others, hoping that the members here present may be able to throw so much light upon the matter that we may come to some probable conclusion as to their origin. An old quarry, about a quarter of a mile west of Wormald Green, which had been for a long time disused, was opened again a few months ago. In the old and new section about 60 or 70 feet of the middle beds of the Lower Magnesian Limestone have been exposed. Throughout 30 feet of the upper portion of the new part there occur innumerable grooves and cavities of a singular character, agreeing with certain fossil remains which are mentioned by Mr. J. W. Kirkby in a paper read before the Geological Society in 1861,* as occurring in the Lower Permian Limestone of South Yorkshire, at Hampole Stubbs. He says, “the occurrence of another Fossil, of somewhat obscure affinities, though possibly an annelid, tuay here be noticed. It is the cast of ...