This is a beautiful sheet consisting of 16 stamps, issued in 2001, displaying a variety of marine reptiles. The animals shown include the Elasmosaurus, Liopleurodon, Platecarpus, Macroplata, Claudiosaurus, Plesiosaurus, Pistosaurus, Placodus, Peloneustes, Nothosaurus, Ceresiosaurus, Metrorhynchus, Bernissartia, Muraenosaurus, Criptoclidus, and the Mesosaurus. The sheet is Post Office fresh, mint never hinged.