Figures

Figure 13.13   Some gastropod genera: (a) Murchisonia (Devonian) (1.25), (b) Euomphalus (Carboniferous) (0.5), (c) Lophospira (Silurian) (0.5), (d) Patella (Recent) (1), (e) Platyceras (Silurian) (1), (f) Neptunea (Plio-Pleistocene) (0.6), (g) Viviparus (Oligocene) (0.8), and (h) Turritella (Oligocene) (1). (Courtesy of John Peel.)

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