The vertebrae are of the general type of those of _Pachyornis_, but the anterior pneumatic foramen commences in the third dorsal. The phalangeals are intermediate between those of _Dinornis_ and _Pachyornis_. Haast considered that the coracoid was aborted and often absent in this genus, in _Emeus_, and _Pachyornis_. As additional characters of the skull it may be mentioned that there is a prominent supra-occipital protuberance, and a depression on the squamosal above the quadrate; the par-occipital processes are pointed, and the basi-occipital processes only slightly prominent; so that the posterior profile of the basi-occipital is nearly straight. The quadrate has a very short anterior process. All the species of the genus are small, in fact _parvus_ is the smallest but one of the family. Type of the genus: _Anomalopteryx didiformis_ (Owen). Number of species: 4. {202} ANOMALOPTERYX DIDIFORMIS (OWEN.) _Dinornis didiformis_ Owen, Trans. Zool. Soc. III, p. 242 (1844). _Anomalopteryx didiformis_ Reichenbach, Nat. Syst. der Vög. p. 30 (1850). _A. didiformis_ Lydekker, Cat. Fossil B. Brit. Mus., p. 275. The present form is confined to the North Island. Owen's type was collected by the Revd. Wm. Williams, and came from Poverty Bay. Habitat: North Island, New Zealand. Portion of skeleton in Tring Museum. ANOMALOPTERYX PARVUS (OWEN.) _Dinornis parvus_ Owen, Trans. Zool. Soc. XI, pp. 233-256, pls. LI-LVII (1883). _Anomalopteryx didiformis_ Hutton, Trans. N.Z. Inst. XXIV, p. 123 (1892), part. _A. parva_ Lydekker, t.c., p. 278. This small form is confined to the Middle Island. The type, a skeleton in almost complete condition, was dug up in a cave at Takaka, near Nelson, and is now in the British Museum. A much less perfect skeleton is in my museum at Tring. Habitat: Middle Island, New Zealand. ANOMALOPTERYX ANTIQUUS HUTT. _Avian Remains_ Forbes, Trans. N.Z. Inst. XXIII, p. 369 (1891). _Anomalopteryx antiquus_ Hutton, Trans. N.Z. Inst. XXIV, p. 124 (1892). _A. antiquus_ was named by Captain Hutton from the photographs of bones described by Dr. Forbes in the above-quoted article. The evidence is very slight on which to found a species, but I prefer to treat it as one, for the bones were discovered in the Upper Miocene, a much older stratum than most remains of _Dinornithidae_ occur in. Locality: Timaru, Middle Island, New Zealand. {203} ANOMALOPTERYX FORTIS HUTT. Anomalopteryx fortis Hutton, Trans. N.Z. Inst. XXV, p. 9 (1893). This is the largest of the genus, and the type bones came from Glenmark. I append comparative table of Measurements: