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. ----------------------------------------------------------------------