Keywords: PZSL1907Page0771.png Acanthodes sp Acanthodiformes sp en Transverse section of a scale of a spiny shark from the Carboniferous of Edinburgh dt branching canaliculi g outer shiny layer i inner opaque layer Proceedings of the Zoological Society of London http //archive org/details/proceedingsofzoo19074471121zool vol 1907 issue 4 http //archive org/stream/proceedingsofzoo19074471121zool page/771/mode/1up page 771 1907 published 1908 From Lankester's Treatise on Zoology by permission of Messrs A C Black PD-old PZSL 1907-4 Illustrations of fish scales Carboniferous Animalia Carboniferous fossils from the United Kingdom animals of Scotland Nature of Edinburgh Acanthodiformes |