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Plate XV. — Left Radius and Ulna 

 A. — innilR aspect 

 I. Summit of olecranon process. 2. Beak of ulna. 3. Slightly concave inner surface of olecranon. 4. Sigmoid cavity. 

 5. Body of ulna. 6. Superior articular surface of radius. 7. Radio-ulnar arch. 8. Bicipital tuberosity. 9. Roughened 

 elevations for attachment of supra-carpal band of flexor perforatus. 10. Shaft of ladius. it. Ronj^licned ridge fur 

 attachment of posterior common ligament of knee. 12. Groove for tendon of extensor melacarpi oblic|uus. 13. ]'"acet 

 for articulation with scaphoid. 



B OUTiCR ASIM'XT 



I. Summit of olecranon process. 2. Beak of ulna. 3. Convex outer surface of olecranon. 4. Sigmoid cavity. 

 5. Roughened area for attachment of external arciform ligament. 6. Roughened area for attachment of external lateral 

 ligament of elbow. 7. Radio-ulnar aich. 8. Bicipital tuberosity. 9. Body of ulna. 10. Shaft of radius. 11. Groove 

 for passage of tendon of extensor suffraginis. 12. Groove for tendon of extensor pedis, 13, Facet for pisiform bone. 

 14. Roughened area for attachment of external lateral hgament of knee. 15. Facet for cuneiform bone. 



