A set of three complete echinoids; featuring: CE 1.31 Isomicraster coranguinum, CE 1.32 Isomicraster senonensis and CE 1.33 Isomicraster stolleyi illustrating the characteristics of the genus Isomicraster.
Size: 45, 50 and 51 mm in diameter
Size: 45, 50 and 51 mm in diameter