Egg shell. The hairs seem to match those on the underside of the leaf it's attached to.
A closeup and stacked image of a green tree frog's eye. Anstead, QLD.
Snail, I think you are missing some shell. Apparently some slugs have shell remnants partially or completely embedded beneath the skin. These are known as slugs because slugs are basically snails without a shell (they can hide in).
