This may be useful: Neck, R.W. 1990 Ecological analysis of the living molluscs of the texas panhandle American Malacological Bulletin 8:9-18 Aydin snailstales.blogspot.com ---------------------------------------------------------------------- [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. ----------------------------------------------------------------------