Noetia ponderosa (Say, 1822) Ponderous Ark

     The specimen has encrusting colonies of Star Coral (Astrangia danae - a rather fast growing species). It is uncertain whether the shell was colonized by the coral while it was alive. 

Noetia ponderosa (Say, 1822)

Noetia ponderosa (Say, 1822)

Dead on beach after storm, Little Talbot Island State Park, Duval County, Florida (62 mm.)