It has been suggested to me that a brief résumé of an illustrated article published last year in the Zeitschrift der deutschen geologischen Gesellschaft might be of general interest. The article in question embodies a piece of research work undertaken at the instance and under the direction of Professor Kayser, of Marburg, who during the Summer of 1900 observed in the neighbourhood of Königsberg, not far from Giessen, a bed of rock differing palæontologically and petrographically from the surrounding Culm slate. The rock, a slaty breccia with a considerable limestone content, furnished even on cursory examination a fauna deviating considerably from that generally associated with the Culm. Type-fossils of the Posidonia Slates (the “Culm of Herborn”), such as Posidonia Becheri, Orthoceras striolatum, and Goniatites crenistria, were not met with, but on the other hand Crinoid stems together with fragments of large Producti and of Trilobites of the genua Phillipsia appeared plentiful.