Plate, figures I and Ia showing the apical portion of the phragmocone of a belemnoteuthis by [Joseph] Dinkel Figures I and Ia from plate XIII showing two views of the apical portion of the phragmocone of a belemnoteuthis. Subject: Palaeontology Published in Philosophical Transactions as 'Observations on some belemnites and other fossil remains of Cephalopoda, discovered by Mr. Reginald Neville Mantell, C. E. in the Oxford clay near Trowbridge, in Wiltshire'. Received by the Royal Society on 2 March 1848. Read 23 March 1848. [1848]