Perhaps one of these would be useful:

        http://www.perlas.com.mx/Ingles/biology2.htm


http://library.kcc.hawaii.edu/external/ctsa/publications/Blackpearl.htm

        http://www.williecreekpearls.com.au/pearl_anatomy.html

----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------