We would like to thank the following for permission to use drawings and pictures, individually acknowledged, from the following Journals and Museums:

• National Museums of Scotland, Edinburgh (N.M.S.)
• Stromness Museum, Orkney (S.M.)
• Fossil and Vintage Centre, Burray, Orkney (F.V.C.)
• British Geological Survey (B.G.S.)
• University of Tartu Natural History Museum
• Linnaean Society (Zoological J. of the Linnaean Society)
• Transactions of the Royal Society of Edinburgh
• Royal Swedish Academy of Sciences

People who helped in making the web pages:

• Selena S. Kuzman for setting up the pages and artistic design.
• Mike Newman for advice, corrections, help and pictures of specimens.
• John Flett Brown, Adrian Hall, Stig Walsh, Carole Burrow, David Leather, Sidney Johnston, the late Jack Saxon, the late Uisdean Michie, Jonathan Jeffery, John Armstrong, Mike Taylor, Roger Jones.
• P.H.de Buisonjé for making most of the models, now in the Natural History Museum of the University of Tartu.