O. deshayesiana is shorter and "chunky", and has a lower spire. The differences between O. deshayesiana and O. vesica are well illustrated here: http://www.gastropods.com/8/Shell_11818.html http://www.gastropods.com/9/Shell_9589.html O. vesica auricularia is like the O. vesica shown here, except with a broader, more expanded lip. Paul M. ---------------------------------------------------------------------- [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. ----------------------------------------------------------------------