Well camouflaged against bark of apricot tree. Very broad, 2 light grey streaks down back. Sat in the same spot for several days.
All these bend in the same direction at the pointy end.
These 54 - 64mm.
Usually the odd one on this beach, this lot probably in proportion to the high number of shells on the beach at the moment.
The edges of a couple maybe showing chipping by paddle crab attack.
Paddle crab - dead and moulted shells.