Unknown Bivlave Families

[wei]

Hi all. I would like to know the families of the shells pictured here. All 4 species seem to be rock borers or inhabiting holes created by other rock borers. Any suggestions are welcome. Their sizes are all about 10mm in length, all found in Singapore waters.

<a href="http://www.shellnutx.com/gallery/v/wei/singapore_collection/Unidentified/" target="_blank"><!-- m --><a class="postlink" href="http://www.shellnutx.com/gallery/v/wei/singapore_collection/Unidentified/">http://www.shellnutx.com/gallery/v/wei/ ... dentified/</a><!-- m --></a>

Thanks in advance  <span class="petit">--Last edited by wei on 2007-12-05 22:58:19 --</span>

[paul monfils]

I am not certain but I would lean toward Petricolidae for most if not all of these.