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HIS genus is closely allied to Aphanapteryx and Erythromachus, but, on the whole, is nearer to Aphanapteryx. It differs from both these genera and Ocydromus in the large protuberances on the basi-temporal region of the skull, and the tarso-metatarsus was much shorter than in Aphanapteryx. For complete diagnosis of this genus see Andrews in Novitates Zoologicae, Vol. III, pp. 73-76 (1896).


 * Aphanapteryx hawkinsi Forbes, Nature XLVI, p. 252.


 * Diaphorapteryx hawkinsi Forbes, Bull. B.O.C.I. p. XXI, 1893.

HE remains of this bird were first sent to Dr. H. O. Forbes in 1892 by the late W. Hawkins, from the Chatham Islands, 500 miles E.S.E. of New Zealand. It appears to have been confined to the Island of Wharekauri. Dr. Forbes subsequently went to the Chathams himself and collected a large number of bones of various extinct birds, including those of Diaphorapteryx. In 1895 I received a consignment of bones through the agency of Mr. Dannefaerd, from the Chathams, such as has never been equalled from any deposit elsewhere, for literally there were many hundreds of thousands of bones of a considerable number of species of birds. From this collection Mr. C. W. Andrews was able to draw up a most minute description of the skeleton of Diaphorapteryx, founded on several practically complete skeletons, some thirty or more skulls, and several thousand individual bones of various portions of the skeleton. This description, published in Novitates Zoologicae, Vol. III, pp. 73-84, is too long for reproduction here, and so I must refer my readers to it.

This bird, as well as the Palaeolimnas, shows an apparent relationship between the Chatham Islands and the Mascarene Islands; but I believe that