﻿PLATE XVII. 



Omosaurus armatus. 



Fig. 



1. Thenal or palmar surface of the left humerus. 



2. Anconal surface of the same. 



3. Proximal end of the same. 



4. Distal end of the same. 



5. Transverse section of narrowest part of the shaft of the same. 



6. Thenal surface of the left humerus of a Monitor niloiicus. 



7. Anconal surface of the left radius. 



8. Thenal surface of the same. 



9. Proximal end of the same. 



10. Distal end of the same. 



11. Transverse section of narrowest part of the shaft of the same. 



12. Thenal surface and proximal end of the left radius of a Monitor niloiicus. 



13. Radial surface of the left ulna. 



14. Ulnar surface of the same. 



15. Radial surface of the left ulna of a Monitor niloiicus. 



Figs. 1 — 5, 7 — 11, 13 and 14, are figured one fourth the natural size, from the 

 Kimmeridge Clay at Swindon, Wilts. In the British Museum. Figs. 6, 12, 15, are of 

 the natural size. 



