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.