Fig. 3

Homologisation of the structures seen in the isolated soft parts of Syrionautilus libanoticus with those in Nautilus pompilius indicated by the same colours for supposedly homologous structures. A Central nervous system of N. pompilius drawn after Fig. 14A in Sasaki et al. (2010). B Isolated soft parts of S. libanoticus from Fig. 1D with different colours. C Lateral view of the isolated soft parts of N. pompilius drawn after Fig. 1A in Sasaki et al. (2010)