150 



BIRD GALLERY. 



EXPLANATION OF PLATE XXV. 



Fig. 6. 

 Left side view of the Skeleton of a Bird. Iceland Falcon (Hierofalco islandus). 



1. Cranium. 

 '2. Quadrate. 



3. Mandible. 



4. Orbit, 



5. Cervical vertebra?. 

 G. Thoracic vertebrae. 



7. Synsacral vertebne 

 [hidden in a side view of 



the skeleton by the 

 iliac bones]. 



8. Caudal vertebrze. 



9. Thoracic rib. 



10. Sternal rib. 



11. Uncinate process. 



12. Sternum. 



13. Keel of Sternum. 



14. Coracoid. 



15. Scapula. 



16. Furcula. 



17. Humerus. 



18. Ulna. 



19. Radius. 



20. Itadial Carpal. 



21. Ulnar Carpal. 



22. Carpo-metacaipus. 



23. Pollex. 



24. Isi Phalanx of 2nd 

 digit. 



25. 1st Phalanx of 3rd 

 digit. 



26. Pubis. 



27. Ilium. 



28. Ischium. 



29. Feihur. 



30. Tibia. 



31. Fibula. 



32. Tarso-metatarsus. 



33. Metatarsi of digit 

 (Ilallux). 



34. Ilallux or hind toe. 



35. Inner or 2nd toe. 



36. Middle or 3rd toe. 



37. Outer or 4th toe. 



Fig. 6. 



Under surface of the Skull of a Bird showing the bones of the palate (2), and the 

 single occipital condyle (1) for the articulation of the skull with the neck. 



Fig. a 

 Sclerotic King of bony plates. 



Fig. 7. 

 Portions of three Ribs to show the position of the uncinate processes (1). 



