Plate, figures 1-5 showing turtle ribs and coracoids by Gideon Algernon Mantell Figures 1-5 showing the ribs of the fossilised turtle and a chelonia, and the coracoids of the fossilised turtle, a marine turtle, and an emys. Subject: Palaeontology Published in Philosophical Transactions as 'On the fossil remains of turtles, discovered in the chalk formation of the South-east of England'. Written by Mantell at Crescent Lodge, Clapham Common [London]. Received by the Royal Society on 11 May 1841. Read 20 May 1841. May 1841