Captain Hutton says that a few bones of this form have been obtained in the North Island at Poverty Bay and Te Aute; but I am convinced he is in error and that these bones are aberrant individual bones of _A. didiformis_ and that _M. huttonii_ is confined to the South or rather Middle Island. The plate of this species has been reconstructed by Mr. Lodge from the mummified remains which form the type specimen of _Didornis didinus_, and the feathers found in the alluvial sands of the CLUTHA RIVER. The type of _Dinornis didinus_ was found at Queenstown by Mr. Squires. Habitat: Middle Island, New Zealand. Mr. C. W. Andrews, in his description of my complete skeleton of _Megalapteryx tenuipes_ has shown that Owen's type specimens of his _Dinornis didinus_ are certainly of a species of the genus _Megalapteryx_, and closely {200} allied to _M. tenuipes_. Mr. Andrews, however, throws some doubt as to whether the pelvis and femora, referred to this species by Hutton, really belong to it. A complete egg which I consider must be of this species is preserved in the Tring Museum. Its measurements are as follows:-- Large circumference, 21.4 inches = 535 mm. Small " 17.5 " = 437.5 mm. This egg was dredged up on the Molyneux River, near Otago, during gold dredging operations in 1901; a second perfect egg was dredged up a few months before in the same river, and was referred by Dr. Benham to _Pachyornis ponderosus_. {201} ANOMALOPTERYX REICHENBACH. The skull is narrow and vaulted, with a long, sharp and slightly deflected beak. Breadth at the squamosals 1½ times the height at basi-temporal, which has a constricted praemaxillary ridge, and the quadrate with a very small pneumatic foramen. The mandible is V-shaped, with a slight inflection of the angle, and a distinct postarticular process. The symphysis is very narrow and pointed, with a long and narrow inferior ridge, not expanding markedly at either extremity. The sternum is longer, flatter and narrower than in _Dinornis_, having no distinct xiphisternal notch, three costal articulations, long and narrow costal processes, slender lateral processes which are often elongated, and usually no coracoidal facets. The pelvis is wider and lower than in _Dinornis_, with the lower border of the postacetabular portion of the ilium descending as a sharp ridge much below the level of the sacral ribs, and without any distinct pectineal process. A hallux is present. The tibio-tarsus and tarso-metatarsus are relatively shorter and stouter than in _Dinornis_, the latter being shorter than the femur, which is usually stouter and relatively shorter than in _Megalapteryx_. The length of the tarso-metatarsus is less than half that of the tibio-tarsus. The femur, besides being usually relatively shorter is readily distinguished from that of _Dinornis_ by its more expanded extremities, the rather longer neck, and the much larger and ill-defined popliteal depression.