Fig. 1

Outline map of the north coast of Norfolk between Cromer (C), Overstrand (O) and Sidestrand (S) (after Donovan 2010, fig. 1). The dark arrow indicates the point of beach access used by S. K. D.; specimens were collected to the limits of the groynes to the southeast and towards Cromer in the northwest. The stippled area is between the low water mark and cliff top; it includes both the beach (groynes are indicated) and slope of the cliffs. Principal roads are shown as solid lines; railways are shown as trellised lines. The inset map, with a stippled coastline, shows part of the east coast of England, with Lincolnshire (left), the Wash (towards bottom left) and Norfolk (centre and right). The area of the main map is arrowed