1. Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, Massachusetts 02138, U.S.A.,
2. California State University at San Bernardino, 5500 University Parkway, San Bernardino, California 92407, U.S.A.,
3. Department of Geology and Geophysics and Peabody Museum of Natural History, Yale University, P.O. Box 208109, New Haven, Connecticut 06520-8109, U.S.A.,