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IFFERS from Dinornis, Palapteryx and Notornis in having an articular surface for a very strong hind toe, and the tarso-metatarsus of a conformation more nearly resembling that found in the Dodo, but shorter and thicker than in the latter. In addition, the strong calcaneal process, perforated by a complete bony canal for the tendon at the back part of the proximal end of the tarso-metatarsus; the perforation above the interspace between the condyles for the middle and outer toes; and the more posterior position for the condyle for the inner toe all prove the distinctness of this genus.

Type: Aptornis otidiformis.


 * Dinornis otidiformis Owen, Trans. Zool. Soc. III, p. 247, pls. XXV and XXVI, fig. 5 (1844).


 * Aptornis otidiformis Owen, ibidem p. 347 (1848).

HIS is the North Island form, and I must refer my readers to Owen's description, only remarking that Mr. Hamilton, Trans. N.Z. Inst. XXIV, p. 179, says the vertebrae assigned by Owen to Cnemiornis all belong to Aptornis.

Locality of type tibia: Poverty Bay, North Island, New Zealand; collected by Rev. Wm. Williams in 1842.