Skull short and massive, with beak rounded and stout. Carina of sternum aborted. Limb-bones short and very stout, the ulna being shorter than the humerus, and having very prominent tubercles for the secondaries; cnemial crest of tibia greatly developed. No foramen between third and fourth trochleae of tarso-metatarsus. Spines of dorsal vertebrae tall. The power of flight was absent. The chief differences from _Cereopsis_ were the presence of extra pre-sacral vertebrae, so that two only instead of three ribs articulate with the sacrum; and an elevated pent-roof arrangement of the _ossa innominata_, which indicate more decided cursorial habits. CNEMIORNIS CALCITRANS OWEN. _Cnemiornis calcitrans_ Owen, Trans. Zool. Soc. V, p. 396 (1865). "The type species. Very considerably larger than the existing _Cereopsis novaehollandiae_, with the limbs relatively much stouter and shorter" (Lydekker). Height of back from ground 26 inches. Length from beak to tail 34 " Habitat: Middle Island, New Zealand. For full description see Trans. N. Z. Inst. VI, pp. 76-84, pls. X-XII (1874). {98} "CNEMIORNIS GRACILIS" FORBES. _Cnemiornis gracilis_ Forbes, Trans. N.Z. Inst. XXIV, p. 187 (1892) (_Nomen nudum_). "A most elegantly moulded goose from the North Island." Unfortunately this is all that has been published about this form! Habitat: North Island, New Zealand. CNEMIORNIS MINOR FORBES. _Cnemiornis minor_ Forbes, Trans. N.Z. Inst. XXIV, p. 187 (1892); vide also Trans. N.Z. Inst. VI, pp. 76-84 (Hector). This species appears to be distinguished from _Cnemiornis calcitrans_ by its very small size, being hardly bigger than _Cereopsis novaehollandiae_. Habitat: Middle Island, New Zealand. {99} CEREOPSIS NOVAEZEALANDIAE FORBES. _Cereopsis novaezealandiae_ Forbes, Trans. N. Zealand Inst. XXIV, p. 188 (1892). This species was founded on an incomplete skull, and differed from _C. novaehollandiae_ by its slightly larger size. Habitat: New Zealand. {101} SARCIDIORNIS MAURITIANUS NEWT. & GAD. _Sarcidiornis mauritianus_ Newton & Gadow, Trans. Zool. Soc. XIII, p. 290, pl. XXXIV, figs. 9-10. The evidence on which this species is founded is a single left metacarpal and an incomplete left half of the pelvis. Its specific character is the very large size as compared to the two existing species. Habitat: Mauritius.