What does aBORAL surface mean?
There is an oral surface with bones.There are spines.There is a central disk.The person is either an arm or a ray.Madreporite.Either arm or Ray.The eye spot is at the tip of the ray.The spine.madreporite.There is a pedicellaria.The pedicellaria is 1X.The spine is on a ray.The pedicellaria is 3X.There is a spine.There is a Pedicellaria40X.There is a Pedicellaria 100X.The pedicellaria is 400X.
The central disk Arm or Madreporite Ray has an eye spot at its tip.
The crab clam stone has rib or spine contents.