This is the current revision of Amniotic egg as edited by Philip J. Rayment(talk | contribs) at 13:12, December 9, 2007. This URL is a permanent link to this version of this page.
An amniotic egg is an egg which has a shell and can hold water. The eggs can be, (given the animal and species), "hard" (rigid) or "soft" a tough (leathery) shell. While watertight, most shells are gas permeable. The shell allows reptile, bird, and some mammalembryos to develop.