ACKNOWLEDGMENTS
The new material from the Quercy phosphorites was obtained after several field campaigns of a team sponsored by the French CNRS (Recherches Cooperatives sur Programme) and helped by the Universities of Paris 6 (Pierre et Marie Curie), Montpellier 2, and Lyon 1. I wish to thank the military authorities that allowed our team to work in the military camp of Caylus. I am indebted to many colleagues, technicians, and students who participated in the excavations over the years, but I would like to mention especially my colleague J.-Y. Crochet for the discovery of the locality of Pech-du-Fraysse. I thank my colleagues G. Rössner for her help in research in the Munich collection and E. Buffeteau for help with the bibliography. I thank also the members of the IPHEP (University of Poitiers), in which this article was prepared, and especially S. Riffaut for preparing . I thank J. Harris and B. Van Valkenburgh for several constructive editing advices. I am indebted to S. Viranta and R. H. Hunt Jr. for their review and their insightful remarks, which greatly improved the manuscript.