Affiliation: | 1. British Museum (Natural History), Cromwell Road, London SW7 5BD, U.K.;2. Ray Alf Museum, Webb School, 1175 West Base Line Road, Claremont, CA 91711, U.S.A.;3. Department of Anatomy, Yale University, New Haven, Conn. 06520, U.S.A.;4. American Museum of Natural History, Central Park West at 79th Street, New York, N.Y. 10024, U.S.A.;5. University of Colorado Museum, Boulder, Col. 80302, U.S.A. |