Am I stuck in the 19th century? The year of publication of Sherborn and Griffin's work in my previous message should be 1934, not 1834. Cheers, José José H. Leal, Ph.D., Director The Bailey-Matthews Shell Museum Editor, The Nautilus www.shellmuseum.org 3075 Sanibel-Captiva Road Sanibel, FL 33957 USA (941)395-2233 fax (941)395-6706