Several people have asked for the URL of the Geological Society of America, which publishes the Treatise on Invertebrate Paleontology. As the topic seems to be of general interest, I'll answer them here. The Society's home page is: http://www.geosociety.org/ You have to go through a long series of pages to reach the Treatise. Look for buttons like "Publications" and "GSA Bookstore". Or, go directly to the Treatise page. Don't bother me if it doesn't work; I copied and pasted it, but I have no great confidence that all of these arcane symbols will be transmitted correctly from my email system to listserver to your email system: http://www.geosociety.org/cgi-bin/mall/doc?treser.htm~0330-10294 Six volumes on Mollusca have been completed, on acid-free paper, neatly bound in dark blue with gold-leaf lettering ("lower" Gastropoda, Cephalopoda other than belemnites, Bivalvia). Scaphopoda and Polyplacophora are included in the Mollusca 1 along with the "lower" Gastropoda. Oysters (my favorite) rate their own volume. I'm coordinating the revision of part W, supplement 1 (Trace Fossils). It may be ready in 2010 or so. Andrew K. Rindsberg Geological Survey of Alabama Tuscaloosa, Alabama, USA