Late Oligocene concretions, occurring as reworked components of local origin in Quaternary fluviatile (river Rhine) deposits at Kamp-Lintfort, Lower Rhine District, F.R.G., are described and their fossil contents are analyzed. The fauna comprises 46 mollusc species, indicating a Chattian B age for most of the concretions, and several non-Mollusca, among which an internal and external mould of the echinoid Schizaster (Schizaster) sp., of which a detailed description is given.