The name _Notornis mantelli_ having been based on a cranium and some leg-bones from the North Island, and the bones of a specimen from the South Island, showing marked differences, Dr. A. B. Meyer was fully justified in describing the latter form as different, under the name of _N. hochstetteri_. According to the describer there are considerable differences in the cranial bones, but the comparison of the leg-bones shows such differences in size that these alone would be sufficient to separate the North and South Island forms. The femur of _N. hochstetteri_ measures 109, that of _N. mantelli_ 122, the tibia of the former 165, the tarso-metatarsus 109, the tibia of the latter 200, the tarso-metatarsus 129 mm. For further measurements see A. B. Meyer, Abbild. Vogelskelett I, p. 30. The upper surface is olive-green with some slaty-blue shading, the quills are black with purplish blue outer webs; rectrices blackish, green on the outer webs. Head, neck, and under surface purplish blue, thighs more blackish. Under tail-coverts white, frontal plate and bill bright red, yellow towards the tip of both mandibles. Feet red. Although this bird is evidently not extinct, a specimen having been captured as late as 1898, it seems that not many examples live at present in New Zealand, as they have been sought after a good deal, and yet only four have been taken so far, _i.e._, the two in the British Museum, one in the Dresden Museum, and the last-mentioned one. Full accounts of the capture of this last specimen have been given in the Trans. New Zealand Institute, XXXI, pp. 146-150, and in Sir Walter Buller's Supplement to the Birds of New Zealand, I, pp. 66-74, where, however, the year of the capture is not mentioned, though one can guess that it must have taken place shortly before the articles on it appeared. Habitat: Middle Island, usually called South Island, apparently nearly extinct. {143} NOTORNIS STANLEYI (ROWLEY). _White gallinule_, Voy. of Gov. Phillip to N.S.W., p. 273, cum tab. (1789). _Porphyrio stanleyi_ Rowley, Orn. Misc. I, p. 36, pl. IX (1875). _Porphyrio melanotus_ (part.) Sharpe, Cat. Birds Brit. Mus. XXIII, p. 205 (1894). _Porphyrio alba_ G. R. Gray, List Birds N.Z., &c., Ibis 1862, p. 214. The first to point out the differences between the bird now in the Liverpool Museum and the specimen in Vienna was Mr. Dawson Rowley. The original description of the anonymous author of Phillip's Voyage is as follows:--