Capt. T. J. Page, U.S.N., made an exploration of the River La Plata and its tributaries in 1859 and 1860, under the orders of the U.S. Government. In the Appendix to his published narrative of this expedition ('La Plata, the Argentine Confederation, and Paraguay,' New York, 1873, 1 vol., 8vo) will be found (p. 599) a short report on the birds collected during the expedition by the late John Cassin. A certain number of species are named, but no exact localities are given. DALGLEISH, JOHN J. Notes on a Collection of Birds and Eggs from Central Uruguay. Proc. Roy. Phys. Soc. Edinburgh, vi. p. 232, and viii. p. 77. [The collections described by Mr. Dalgleish were formed by a correspondent in the district of San Jorge, in the province of Durazno, Uruguay. The specimens sent along with the eggs were determined by Messrs. Sclater and Salvin.] DARWIN, CHARLES. Zoology of the Voyage of the 'Beagle' during the years 1832-6. Part III. Birds. By John Gould, Esq., F.L.S. London, 1841. Darwin, when Naturalist to the 'Beagle,' during her voyage round the world in 1832-6, made good collections of birds on the Rio de la Plata and along the shores of Patagonia. Most of his specimens, originally deposited in the Zoological Society's Museum, are now in the British Museum, but some of them unfortunately are in a very imperfect condition. His valuable notes were published in the work of which the title is above given. They relate to about 80 species of Argentine Birds. The specimens were determined and the new species described by Gould; but Gould's MS. was afterwards revised for publication by G. R. Gray, on account of Gould's absence in Australia. Darwin's 'Naturalist's Voyage,' originally published as a volume of the Narrative of the 'Voyage of the Beagle,' also contains many excellent notes on the life and habits of Argentine Birds. DOERING, ADOLF. Informe Oficial de la Comision Científica agregada al estado mayor general de la Expedicion al Rio Negro (Patagonia). Realizada en los meses de Abril, Mayo y Junio de 1879, bajo las órdenes del General D. Julio A. Roca. Entrega I. Zoología. Buenos Aires, 1881. Dr. Adolf Doering, of the Argentine University of Cordoba, has been a zealous collector and observer of the birds of the Republic (see under Cabanis and Sclater). The zoological portion of his report upon the Rio Negro expedition of 1879 gives a list of the birds, which contains 110 species, most of them well-known Patagonian forms. DURNFORD, HENRY. Henry Durnford, a member of the British Ornithologists' Union, whose early decease was a severe loss to ornithological science, was a constant worker on birds from the time of his arrival in Buenos Ayres in 1875 until his death in 1878. The birds collected by Durnford are now mostly in the British Museum. His published papers on this subject are the following (see also biographical notice in 'Ibis,' 1879, p. 121):--