Micraster leskei
Echinoid
Late Cretaceous (Turonian)
Rouen Chalk, Leskei biozone
Dieppe (76), France

42mm on 82mm chalk slab.

Micraster is an extinct genus of sea urchin from the Late Cretaceous (Turonian) to at least the Early Paleocene of various parts of the world. 

Nice affordable specimen for the kid new to echinoids. Foram collectors will want to see what’s in the chalk.