This image of an echinoid identified as  Hemicidaris intermedia  Fleming. It was found in the Corallian Beds Coral Rag Calne Wilts. Engla...

This image of two echinoid spines identified as  Paracidaris florigemma (Phillips). They were found in the Corallian Beds Coral Rag Calne...

This image shows an intact  Phacops stokesi  Edward trilobite fossil. It was found in the Silurian Period Wenlock series of Dudley Worce...