Special Papers in Palaeontology, published by The Palaeontological Association, is a series of substantial separate works conforming to the style of the Palaeontology journal. Two issues are published each year and feature high standard illustrations. * Investigates the thelodonts and putative chondrichthyans from rocks of upper Llandovery (Lower Silurian) to Lochkovian (Lower Devonian), from Baillie-Hamilton and Cornwallis islands, Arctic Canada * Presents new anatomical information which will allow greater precision in future phylogenetic studies of thelodonts and related vertebrates * Brings together researchers, geologists and enthusiasts who continue to find material of significance * Includes 29 plates and 71 text-figures