What are the structures known in Lindisfarne in the UK as St Cuthbert's beads, or in Germany as St Boniface's pennies?
Fossilised disc-shaped parts of the stems of a type of marine echinoderm
fossilised disc shaped parts of stems of type of marine echinoderm
fossilised disc shaped parts of stems of type of marine echinoderm
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Fossilised disc-shaped parts of the stems of a type of marine echinoderm