Dear Conch-Lers, Thanks for your replies. Yes, of course it looks like a juvenile specimen, but just one month ago I got an exactly identical specimen, more heavy than a normal adult C. Tigris and with a strange irregularity on labial side: perhaps good reasons for having some doubts.. Francesco ---------------------------------------------------------------------- [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. ----------------------------------------------------------------------