Abstract
For a land with a dearth of natural rock outcrops, the Netherlands abounds with urban ‘exposures’ of fossiliferous rocks such as building stones, street furniture and street art. In the Rapenburg in Leiden, sections through distinctive shells in Mississippian (Lower Carboniferous) limestones are identified as rostroconch molluscs (Order Conocardioidea). The generic identification is tentative, but the specimens may belong to the genus Filicardia Rogalla and Amler, perhaps the common Filicardia inflata (M’Coy). The only other mollusc taxon that has been identified from these rocks is the gastropod Straparollus? sp.
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