Can anyone give me the name of a source on identifying cerion shells? Emeritus Professor of PhysicsOglethorpe University, Atlanta, GAebooks at https://www.smashwords.com/books/search?query=John+Cramerpaperback books at https://www.lulu.com/shop/search.ep?keyWords=john+a.+cramer&type=&pn=2 ---------------------------------------------------------------------- [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/scripts/wa-UGA.exe?SUBED1=conch-l-L&A=1 Type your email address and name in the appropriate box and click leave the list. ----------------------------------------------------------------------