The Australian bird hitherto referred to this genus should certainly receive a new generic appellation, since it does not agree either in form or habits with the true _Berniclæ_. 541. Bernicla jubata Vol. VII. Pl. 3. Genus NETTAPUS, _Brandt._ Of this beautiful genus of Pygmy Geese there are at least four species known; one inhabiting Africa, one India, and two Australia. 542. Nettapus pulchellus, _Gould_ Vol. VII. Pl. 4. 543. Nettapus albipennis, _Gould_. Nettapus Coromandelianus Vol. VII. Pl. 5. I feel confident that the Australian bird which I have figured under the name of _N. Coromandelianus_, is quite distinct from the Indian, and I have therefore assigned it a new name. My figures are stated to be of the natural size, but this is an error: they are considerably smaller. Genus CYGNUS, _Linn._ Only one species, the _C. atratus_, is, I believe, found south of the line; for the Black-necked Swan of Chili will doubtless prove to be generically distinct. 544. Cygnus atratus Vol. VII. Pl. 6. This “rara avis in terris” is not only strictly confined to Australia, but is so exclusively an inhabitant of the southern districts, that no notice has been recorded of its having been seen in Torres’ Straits, or on any part of the north coast. Genus CASARCA, _Bonap._ This ornamental section of the _Anatidæ_ is not very numerous in species. 545. Casarca Tadornoïdes Vol. VII. Pl. 7. A beautiful representative of the _C. rutila_ of Europe. Genus TADORNA, _Leach_. 546. Tadorna Radjah Vol. VII. Pl. 8. An equally beautiful representative of the _T. Vulpanser_. Genus ANAS, _Linn._ Of true Ducks three species are found in Australia. 547. Anas superciliosa, _Gmel._ Vol. VII. Pl. 9. This bird assimilates very closely in its structure and in its economy to the _Anas Boschas_ of Europe, but in its plumage it is very different. 548. Anas nævosa, _Gould_ Vol. VII. Pl. 10. A very singular Duck, perhaps more nearly allied to _Chaulelasmus_ than to _Anas_. It is a very rare bird, and has only yet been seen on the western and southern coasts of Australia; its true habitat is probably the distant interior. 549. Anas punctata, _Cuv._ Vol. VII. Pl. 11. This species has much the appearance of the Teal (genus _Querquedula_), but in its structure is nearly allied to the true ducks (genus _Anas_), with which I have provisionally placed it. Genus SPATULA, _Boie_. The great continents of America, Africa, Asia and Australia, are each inhabited by one or more species of this restricted genus.