Plate XXIII.

Fig. 1. Tail-vertebræ of the supposed hybrid in side view. Natural size.

Fig. 2. The same parts in Ocydromus australis. Also natural size.

Fig. 3. Outside view of the lower mandible of the assumed hybrid. Natural size.

Fig. 4. Similar aspect of the lower mandible of O. australis. Natural size.

Fig. 5. Upper view of the lower mandible of the supposed hybrid. Natural size.

Fig. 6. Corresponding bone of Ocydromus. Also of natural size.

Fig. 7. Upper surface of the tongue-bones and cartilaginous appendages of the quasi-hybrid. Natural size.

Fig. 8. Same parts in O. australis. Natural size.

Fig. 9. Right tarso-metatarse and foot of supposed hybrid fowl, in front view, showing scutellation, &c. Half natural size.

Fig. 10. Corresponding parts in O. australis. Natural size.

Fig. 11. Anterior view of the tibial cnemial process and upper end of right tibia of the so-called hybrid.

Fig. 12. The corresponding bone in O. australis.