"Tibiae slightly compressed, shorter than the femora. Four toes, slender, of which three point forward (are front toes). The middle one almost as long as the Tibia, the side ones of equal length shorter, the back one short, raised from the ground. Nails short, small, slightly incurved, pointed, and light coloured. Head oval, slightly depressed, fuscous. A superciliary line from bill to occiput whitish. Throat white. Hindneck ferruginous. Neck very short. Back and rump black, sparsely dotted with minute white dots. Breast bluish grey. Abdomen, crissum, and loins white. Wings short, wholly black, variegated with broken white bands. Remiges short. Rectrices extremely short, black spotted with white, hardly to be distinguished from the coverts. Total length from bill to tail 9 inches. Total length to middle toe 12¾ " Bill 1-1/10 " Tibiae 2 " Middle toe 1-3/10 " " Mr. Keulemans' plate was done from Forster's unpublished drawing in the British Museum, and no specimen is in existence. The legs should, however, be less bright red, more flesh-colour. Habitat: Tahiti, but evidently long extinct. This bird, according to Forster, was called "Oomnaa" or "Eboonaa," on Otaheite, and the neighbouring islands. {125} NESOLIMNAS ANDREWS. Differs from _Cabalus_ by the relatively shorter bill; by having the whole culmen convex with the tip sharply decurved, by having a close instead of a loose plumage, and a much less reduced sternum, with a well-developed instead of almost obsolete keel. Type of genus _Nesolimnas dieffenbachi_ (Gray). NESOLIMNAS DIEFFENBACHII GRAY. (PLATE 27.) _Rallus Dieffenbachii_ Gray, Dieffenb., Trav. N.Z. II App. p. 197 (1843). _Ocydromus dieffenbachi_ Gray, Voy. Ereb. and Terr., Birds p. 14, pl. 15 (1846). _Hypotaenidia dieffenbachi_ Bonaparte, C. R. XLIII, p. 599 (1856). _Cabalus dieffenbachi_ Sharpe, Voy. Ereb. and Terr., Birds p. 29, pl. 15 (1875), id., Cat. B. Brit. Mus. XXIII p. 47 (1894). _Nesolimnas dieffenbachi_ Andrews, Novit. Zool. III. p. 266, pl. X, figs 3-15 (1896).