NOTORNIS MANTELLI OWEN. _Notornis mantelli_ Owen, Trans. Zool. Soc. III, p. 377, pl. LVI, figs. 7-11 (1848). This species was founded on a nearly entire skull, collected by Walter Mantell at Waingongoro, North Island, New Zealand. This skull is more than twice the size of that of _Porphyrio melanotus_. The basisphenoidal surface, however, is flatter, the anterior angle projects below the base of the presphenoid, and there is a slender ridge continued from each paroccipital to the lateral angles of the platform, the posterior angles being hemispheric tubercles as in _Palapteryx_. The occipital region inclines forwards as it rises, while the same is more vertical in _Porphyrio_. The post-frontal is broader than in _Porphyrio_. The chief distinction from that of _Porphyrio_ is, however, the almost regular four-sided figure of the skull. The breadth of the anterior part is almost exactly that of the occipital region, and the extent of the sides is not much more than that of the front and back part. The parieto-frontal region of the skull is very unlike that of _Porphyrio_, being convex and oblong, and _Notornis_ also lacks cerebral or hemispheric convexities. Owen gives a large number of other differences, but I refer my readers to the original article as above, pp. 366-371. I, however, must state here, as is already mentioned by Mr. Hamilton, Trans. N.Z. Inst. XXIV, p. 176, 1892, that the _Dinornis_ skull, with which Professor Owen compared _Notornis_, referred by him to _D. casuarinus_ is really that of _Aptornis defossor_ (_vide_ Trans. Zool. Soc. III, pl. 52, figs. 1-7), and, therefore, it is quite natural that Professor Owen found a great likeness to _Dinornis_ in _Notornis_, as the skull he compared it with was really that of the Ralline _Aptornis_, and not the Struthious _Dinornis_ at all. Habitat: North Island, New Zealand. Dr. H. O. Forbes, Trans. N.Z. Inst., discusses at length measurements of tibiae and femora of _Notornis_, provisionally naming the skeleton in the Otago Museum _Notornis parkeri_, as a new species, but I consider we must wait for confirmation till we get an associated skeleton of _N. mantelli_. {142} NOTORNIS HOCHSTETTERI A.B.M. (PLATE 34.) _Notornis Hochstetteri_ A. B. Meyer, Abbild. Vogelskelett, Lief. IV & V, p. 28, pl. XXXIV-XXXVII (1883--South Island, New Zealand); Zeitschr. ges. Orn. II, p. 45, pl. I (1885--figures of the bird). _Notornis mantelli_ (non Owen 1848!) Gould, P.Z.S. London, 1850, pl. 21; Trans. Zool. Soc. London IV, pl. 25 (1850); Gould, B. Austr. Suppl., pl. 76 (1869); Buller, B. New Zealand, pl. (1873); Sharpe, Cat. B. Brit. Mus. XXIII, p. 208 (1894).