Some features that distinguish squamata from diversicolor s.s :
"A more highly arched shell and stronger, more scaly spiral ribbing" (Owen).
At low tide under slabs, Broome, West Australia. 48-57mm.

Variations in sculpture. Same spot, 49-58mm. The brown shell shows strong radial accretion lines.

Same spot, 47-61mm.

At low tide, under rocks covered with fine weed, Dampier archipelago, W. Australia.
48-68mm. Original pictures © R. Kershaw.