Clypeus plotti Salter.
Lovely example of the 'classic' Cotswold fossils often referred to as 'Chedworth buns'. These 'poundstones' were used as makeshift weights by local farmers. Perfect matrix free specimen with colonies of serpulid worms on both the upper and lower surfaces.
Jurassic, Bajocian, Clypeus Grit.
Chedworth, Gloucestershire.
Echinoid : 9.5 x 9.5 x 2 cm.