If we acknowledge that _D. novaezealandiae_ occurs both on the North and Middle Islands, then I feel sure that the distinctness of _D. gracilis_ and _D. torosus_ cannot be maintained, as the measurements intergrade completely. The type of _D. gracilis_ came from Wanganui, while that of _D. torosus_ is a nearly perfect skeleton found in a cave at Takaka, near Nelson. Habitat: New Zealand. There is an imperfect skeleton in the Tring Museum, from a limestone cave at Takaka, near Motueka, Province of Nelson, New Zealand. DINORNIS DROMIOIDES OWEN. _Dinornis dromioides_ Owen, Trans. Zool. Soc. III. p. 235 (1843). _Palapteryx dromioides_ Reichenbach, Nat. Syst. der Vög. p. XXX (1850). _Palapteryx plenus_ Hutton, Trans. N.Z. Inst. XXIV p. 122 (1892). This form also inhabited both islands, but was probably one of the rarest. The type of _D. dromioides_ came from Poverty Bay, and that of _P. plenus_ from Glenmark. Habitat: New Zealand. DINORNIS NOVAEZEALANDIAE OWEN. _Dinornis novaezealandiae_ Owen, P.Z.S. (1843) p. 8. _D. struthioides_ Owen, Trans. Zool. Soc. III p. 244 (1844). _D. strennus_ Hutton, Trans. N.Z. Inst. XXV p. 8 (1893). Professor Owen changed the name of this form, but we cannot accept this change, as it is against the laws of nomenclatorial priority, though we all appreciate the motive the Professor had in making this change. The type came from Poverty Bay, but the bird inhabits both islands. This species had wings. Habitat: New Zealand. A nearly perfect skeleton in the Tring Museum from Waitomo district, Auckland, New Zealand. {195} MEGALAPTERYX HAAST. Originally distinguished by Haast from the _Dinornithidae_ as an ancient form of the _Apterygidae_, but afterwards united by Lydekker with the _Dinornithidae_. Mr. Lydekker's diagnosis of the genus is as follows:-- "Distinguished from _Dinornis_ by the extreme slenderness and length of the femur and tibio-tarsus, and the relatively shorter tarso-metatarsus, of which latter the length is considerably shorter than that of the femur. The pelvis is much narrower than in Dinornis, with the ventral surface of the postacetabular sacrals ridged and narrower, and a more developed pectineal process to the pubis. The femur is markedly curved forwards, with the distal extremity moderately expanded, the popliteal depression larger and less defined, the linea aspera narrower and sharper, and a more distinct anterior intermuscular ridge." The following additional diagnostic characters are taken from Mr. Charles W. Andrews' description of the complete skeleton of _Megalapteryx tenuipes_ in the Tring Museum (Nov. Zool. IV, pp. 188-194, fig. 1-2 in text and pl. VI):--