2/7/10: Should anyone actually visit this presentation, the following two slides present a shell I've tentative called C. parvada, but which I doubt truly is. Rolán has made a preliminary review of the photos and also does not believe this shell is C. parvada, but may be C. cruzana Nowell-Usticke, 1959. However, it will take closer examination. So, the shell is on the way to Spain. Watch for update.