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40

[[underline]] darwini. [[underline]]

     This second and last volume includes the orders [[underline]]Macrochires, Pici, Caeyges, Psittaci, [[?]], Accipitres, Steganopodes, Herodiones, Anseres, Columbæ, Gallinæ, Geranomorphæ, Lunicolæ, Gaviæ, Pygopodes, Impennis, Crypturi, and Struthiones[[/underline]]. The introduction (pp. xvii – xxiv), gives a general review of the subject of geographical distribution of birds within the Neotropical Region, defines the several subregions (six in number), and goes somewhat into detail in discussing relationship of the Argentine bird-fauna, which it is stated "comes within the limits of the Patagonian Subregion". The appendices are, "I. List of the principal Authorities