I have found this lother link : http://www.listserv.uga.edu/cgi-bin/wa?A2=ind9810a&L=conch-l&F=&S=&P=14418 . Franck ---------------------------------------------------------------------- [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. ----------------------------------------------------------------------