_Palaeocasuarius haasti_ Forbes, Trans. N.Z. Inst. XXIV, p. 189 (1892). Femur: length approximately 8.5 inches; width across head and great trochanter 2.25 inches. Tarso-metatarsus: length 7 inches; width in centre 1.15 inches, at distal end 2.75 inches. Type from Manitoto in Liverpool Museum. This bird exceeded considerably the cassowary in size, is all the author tells us of this bird. It is a pity that Dr. Forbes did not insist on the publication in full of his paper, as proper descriptions of all the twelve new species are wanting. Habitat: New Zealand. PALAEOCASUARIUS VELOX FORBES. _Palaeocasuarius velox_ Forbes, Trans. N.Z. Inst. XXIV, p. 189 (1892). Femur: length 9.5 inches; width across head and trochanter 2.75 inches, across distal end 2.5 inches. Tarso-metatarsus: length 7 inches; width in centre 1.5 inches, across distal end 3 inches. Type specimen from Manitoto in Liverpool Museum. Habitat: New Zealand. PALAEOCASUARIUS ELEGANS FORBES. _Palaeocasuarius elegans_ Forbes, Trans. N.Z. Inst. XXIV, p. 189 (1892). Femur: length 10.75 inches; width across head and trochanter 3.25 inches, across distal end 3.4 inches. Tarso-metatarsus: length 7.8 inches, width over centre 1.75, over distal end about 3.3 inches. Type specimen from Manitoto in the Liverpool Museum. Habitat: New Zealand. {221} AEPYORNITHIDAE. The first notice we have from a scientific man of the existence on Madagascar of large Struthious birds is the description by Isidore Geoffroy-Saint-Hilaire of two eggs and a few osseous remains, in the Annales des Sciences naturelles III, Zoologie, vol. XIV (1850). These important objects were sent to the describer by a colonist of Réunion, Monsieur de Malavois, but were obtained from the natives in Madagascar by Captain M. Abadie. A third egg arrived smashed. The name given on this evidence was _Aepyornis maximus_. Since then some 40 eggs at least and a large number of odd bones have been collected by Monsieur Grandidier, Messrs. Last and others, and Dr. Forsyth Major, but only one practically complete, and one less complete skeleton of a smaller species, named _Aepyornis hildebrandti_ by Dr. Burckhardt. A large number of species has been diagnosed on the evidence of these bones and eggs by Professor Milne-Edwards, Mr. Dawson Rowley and Mr. Andrews, and a second genus, _Mullerornis_, established. The following is the diagnosis of the family AEPYORNITHIDAE.