A display specimen of Osteolepis macrolepidotus from the Orkney Islands, Scotland. This sample was found in old red sandstone, Sandwick fish beds dating it to the Devonian period. Osteolepis is an extinct genus of lobe-finned fish that lived during the Devonian period. Osteolepis' body was covered in heavy rhomboid scales, the scales on the fish's head were covered in a thin layer of cosmine a somewhat spongy bony material containing canals to sensory organs. This is believed to have allowed the fish to sense changes in water pressure. The piece including its matrix measures roughly 21.5 x 11.5 x 2.5 cm and weighs around 1.631 kg, the fossil itself measures roughly 12.5 x 3.6 cm. This specimen is supplied with an information card and is a must have for any serious fossil collector.