Tetragramma variolare
Echinoid
Late Cretaceous (Cenomanian)
Rouen Chalk, Rouen Horizon, Rhotomagense Zone, Acutus subzone
La Heve, La Havre (76), France

30mm echinoid on 95mm chalk slab.

Tetragramma is an extinct sea urchin genus known from the Late Jurassic (Oxfordian) to Late Cretaceous (Turonian).  It has a wide distribution (sites in Texas, Brazil, Europe, north Africa, the Middle East, and Madagascar).

Yeah, they find these all over the world but complete ones are uncommon. Foram collectors will want to sample the matrix.