As Charles Island has been inhabited for many years it is not at all unlikely that a bird became extinct on that place. On plate 3 is figured _G. magnirostris_ and a head of _G. strenua_ for comparison. {12} GEOSPIZA DENTIROSTRIS GOULD. _Geospiza dentirostris_ Gould, Proc. Zool. Soc. London 1837, p. 6; Rothschild & Hartert, Nov. Zool. 1899 p. 163, 1902 p. 396. This curious form differs from _G. fortis fortis_ (Charles Island!) in its bill, which is bowed in towards the end of the upper mandible, and slightly "toothed" on its cutting edge. The one specimen in the British Museum certainly came from Charles Island, and we may, therefore, conclude that the other also came from there, and there is certainly no reason to think that it came from Chatham Island. As the skins in the British Museum slightly differ from each other, there is some reason to suspect that they are both aberrations of _G. fortis fortis_. Otherwise it must have become extinct, as, in spite of special attention being paid to it, none of the recent collectors met with _G. dentirostris_. {13} POMAREA NIGRA (SPARRM.) _Muscicapa nigra Sparrmann_, Mus. Carlson. I, pl. 23 and text (1786--Society Islands). _Pomarea nigra_ Sharpe, Cat. B. Brit. Mus. IV, p. 434 (1879--Full synonymy, description, etc., Society Islands, Marquesas group). In the list of birds now fully extinct, in the Proceedings of the Fourth Intern. Orn. Congress, I enumerated _Pomarea nigra_, on the strength of E. L. Layard's statement, P.Z.S. 1876, p. 501, who says: "This bird has undoubtedly become extinct. Large sums have been offered by Messrs. Godeffroy's collectors for the acquisition of a single specimen, but in vain! The very old natives say they remember the bird and call it "Moho." I, however, overlooked the fact that this note of Layard's referred to the Friendly Islands only, and that this bird has afterwards been obtained in numbers on the Marquesas group. It would, nevertheless, be very interesting to compare specimens from the various islands, viz.: the Society group, Marquesas and Tongatabu, to see if they are perfectly similar. {15} MIRO TRAVERSI BULLER. (PLATE 5, FIG. 1.) _Miro traversi_ Buller, B. New Zealand, Ed. I p. 123 (1873--Chatham Islands). _Petroeca traversi_ Hutton, Ibis 1872, p. 245. _Myiomoira traversi_ Finsch, Journ.-f.-Orn. 1874, p. 189. _Miro traversi_ Sharpe, Cat. B. Brit. Mus. IV p. 236 (1879). _Miro traversi_ (partim) Buller, Suppl. B. N. Zealand II p. 125? pl. XII (October, 1906).