#1 is a unionoid shell, very probably from eastern Asia (where most
pearl culture takes place). It's been polished and there are a lot of
species that could be used.
#2 is an annelid tube. Chaetopterus is a likely guess; more
information about the structure of thetube would help.
#3 looks like the lettuce bryozoan, Thalmoporella floridana, but a
closer view to show the individuals making up the structure would be
needed for confirmation.
--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"
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