This is a beautiful sheet consisting of 16 stamps, issued in 2001, displaying a variety of primitive reptiles. The animals shown include the Peltobatrachus, Hypsognathus, Scutosaurus, Paracyclotosaurus, Hylonomus, Elginia, Platyhystrix, Westlothiana, Logosuchus, Labiosaurus, Erypos, Eogyrinus, Seimouria, Pareiasaurus, Cacops, and the Milleretta. The sheet is Post Office fresh, mint never hinged.