A set of five complete echinoids ranging from the lower Planus Zone up into the mid-Coranguinum Zone. This set is accompanied by literature and a chart showing their stratigraphical relationships. Details of the major morphological changes are given and also instructions for a practical exercise in conjunction with set CE 2.1 to help demonstrate the difference between phylogeny and ontogeny.
Size: 37 mm to 55 mm in diameter.
Size: 37 mm to 55 mm in diameter.