The skull, pelvis, and most vertebrae, as well as the sternum of this form are unknown.
Habitat: S. W. Madagascar.
Three Femora, two tarsi-metatarsi, and two incomplete tibia-tarsi are in the Tring Museum, collected by Last in the Antinosy country.
There are two eggs of this species at Tring, the measurements of which are as follows:—
| No. 1, Antinosy Country, Last. | ||
| Large circumference | 862.5 | mm. |
| Small circumference | 631.5 | " |
| No. 2 (traded). | ||
| Large circumference | 883 | mm. |
| Small circumference | 763 | " |
The egg mentioned by Mr. Lydekker in Cat. Foss. Birds B.M., page 214, No. 41847 is, judging from its size, undoubtedly an egg of this species, and I quote the measurements, as they are very large:—
| Largest circumference | 921 | mm. |
| Smallest circumference | 768 | " |
The egg purchased in 1854 in the Paris Museum measures:—
| Large circumference | 925 | mm. |
| Small circumference | 753 | " |