People,

I found the rocks at Punta Pelada on Costa Rica's Pacific coast were covered
with small live Littorina-like snails at the upper reaches of the intertidal
area, beyond most of the Nerites.

Keen has something from Puntarenas, C.R. she called Lacuna succinea Mörch,
but was uncertain about its true placement. The size of my specimen is about
right: 5 - 6 mm. But she says they are on seaweed rather than on rocks and
there's a chink-like umbilicus. Mine was clearly exposed on rocks and has an
obvious umbilicus. Surface is eroded and gray.

Anyone familiar with this ubiquitous gastropod? A Google search turns up
nothing. Maybe the name has been revised.

David Kirsh
Durham, NC