150 BIRD GALLERY. 
EXPLANATION OF PLATE XXV. 
Fig. 5. 
Left side view of the Skeleton of a Bird. Iceland Falcon (Hvere/alco islandus). 

1, Cranium. | 13. Keel of Sternum, | 26, Pubis. 
2. Quadrate. | 14. Coracoid. 27. Ilium. 
3. Mandible. | 15. Seapula. 28. Ischium. 
4, Orbit. | 16. Furcula. | 29, Femur. 
5. Cervical vertebree. | 17. Humerus. | 30. Tibia. 
6. Thoracic vertebree. | 18. Ulna. 31. Fibula. 
7. Synsacral vertebrie 19. Radius, 32, Tarso-metatarsus. 
(hidden in a side view of 20. Radial Carpal. 33. Metatarsal of digit 1 
the skeleton by the, 21. Ulnar Carpal. (Hallux). 
iliac bones]. 22. Carpo-inetacarpus. 34, Hallux or hind toe. 
8. Caudal vertebree. | 23. Pollex. 35, Inner or 2nd toe. 
9. Thoracic rib. 24. Ise Phalanx of 2nd 86. Middle or 3rd toe. 
10. Sternal rib. . digit. 37. Outer or 4th toe, 
11. Uncinate process, | 25. Ist Phalanx of 3rd 
12. Sternum. | digit. 
Hig. 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. 64 
Sclerotic Ring of bony plates. 
Bi 
Portions of three Ribs to show the position of the uneinate processes (1). 
de 
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