Pygurus (Mepygurus) depressus Agassiz.
Matrix free well preserved Echinoid. The top surface has been polished to highlight the detail of the plates and petaliferous areas. Bottom surface natural. Nice example.
Jurassic, Callovian.
Tulear, Madagascar.
Echinoid : 8.5 x 7.5 x 1.8 cm.
