The Nature Education Centre of the Jagiellonian University in Krakow has in its collection a spectacular fossil of a Jurassic crinoid, in literature known as Seirocrinus subangularis (Miller). Only several museums in Central Europe can boast such a perfectly preserved and complete specimen of Seirocrinus. As seen against Polish museum collections the slab in question is an outstanding object. That very form was a cosmopolitan and pseudoplanktonic crinoid species spread throughout Asia, Europe, and Northern America, yet it has never been documented in Poland. The particular specimen reached Poland in the mid-19th century from Germany to enrich the collection of the Mineralogical Cabinet. The paper presents the turbulent history of the slab with some dozen specimens of echinoderms on it, the story which will shortly have a happy end, since it will be permanently placed as a geological exhibit at the Nature Education Centre of the Jagiellonian University.
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