18.2 Leptochiton cancellatus album COMPARISON L. scabridus.

18.2 Leptochiton cancellatus album COMPARISON L. scabridus.

L. scabridus. Central mucro (1). Granules vary from rounded bosses to angular; arranged radially on head valve, postmucronal area (2) of tail valve and the lateral triangles (3) of intermediate valves. Arranged in longitudinal lines on central areas (4) of intermediate valves and the antemucronal area (5) of the tail valve. Granules orientated as on L. cancellatus, but larger on L. scabridus.
Leg. © S. Trewhella.