Two bigger sized echinoids with many little Fibularia .

Name : Eupatagus wrighti (LAUBE, 1869) + Fibularia gregata (TATE, 1885)
Age : Oligocene
Findspot : Murray river , Australia
Dimensions : 9×8.5×5.4 cm
Weight : 231 g
This is a very nice specimen of an uncommon echinoid association. The size of the biggest echinoid is 3.1 cm.