. "Salvin, Osbert, 1835-1898" . . . . . "Barton, Benjamin Smith, 1766-1815 Barton's Fragments of the natural history of Pennsylvania" . . . "Biologia centrali-americana" . . . "Electronic Biologia Centrali-Americana" . . . "Maudslay, Alfred Percival, 1850-1931 Biologia Centrali-Americana, or, Contributions to the knowledge of the fauna and flora of Mexico and Central America. Archaeology" . . . "Salvin, Osbert, 1835-1898 Catalogue of the PicariƦ in the collection of the British museum" . . . "Saunders, Howard, 1835- Catalogue of the GaviƦ and Tubinares in the collection of the British museum" . . . "Sclater, Philip Lutley, 1829-1913 Report on the birds collected during the voyage of H. M. S. Challenger in the years 1873-1876" . .