Columbarium harrisae Harasewych, 1983. Two specimens trawled from deep water off Lady Musgrave Island, Queensland in the 80's.
V. mutabile, 16.5 mm long
https://www.marinespecies.org/aphia.php?p=taxdetails&id=752128
Shore diving at Pupukea Beach Park, max depth 39 ft/12m.
Not entirely sure of ID, but Hoover notes that in this species the sides of the shell are fused and it can't close. Certainly me bumbling around near it with a camera didn't make it close.
Dive site St. Anthony (wreck), max depth 21.6m / 71 ft. 82F.
On the mooring line.