Hi Tom & Paul American Seashells only has 2 Editions. However, Compendium of Seashells has 3, and is in its 7th printing. Other than cosmetics is identical to the "American Malacologist Inc" - 3rd Printing 1st Printing / 1st Ed = EP Dutton 1982 § 2 errata sheets were available as inserts, dated Dec 1982 & Feb 1983 2nd Printing / 1st Ed Revised = EP Dutton 1983 § Changes & corrections in captions marked with * asterisks § No changes or additions in pictures. 3rd Printing / 1st Ed Revised (= 3rd revision) = American Malacologist Inc 1986 § Only one new asterisk added, § new table of Errata added to page 411. Hope this is of help! Leslie Paul, As I understand it, the latest edition is merely a reprint of the 3rd edition and as such would have the errata originally printed on the last page of that edition. Tom E