Plate XIX. 



Figures 1-8. Bones of the left wing preserved in the type of P. ingens Marsh, No. 1175. 

 xO.30 



Figure 1. Humerus ; superior or anconal surface. 



Figure 2. The same bone ; inferior surface. 



Figure 3. Ulna; inferior surface. 



Figures 4a, 4b. Proximal and distal ends of the radius ; inferior surface. 



Figures 5 a, 5b. Proximal and distal ends of metacarpal V. 



Figure 6. Carpus ; proximal surface. 



Figure 7. Carpus ; dorsal view. 



Figure 8. Carpus ; distal view. 



Figures 9-19. Bones of the right wing preserved in the type of P. occidentalis Marsh, 

 No. 1164. x 0.30 



Figure 9. Humerus ; superior or anconal surface. 



Figure 10. The same bone ; inferior surface. 



Figure 11. Ulna; proximal end; superior surface. 



Figures 12a, 12b. Proximal and distal ends of the radius; superior surface. 



Figure 13. Carpalia : proximal surface. 



Figure 14. Carpalia ; distal surface. 



Figures 15a, 15b. Fragmentary metacarpal V. 



Figure 16. First phalanx of digit V (wing finger) ; radial side. 



Figures 17a, 17b. Proximal and distal ends of the second phalanx of digit V; 



radial side. 

 Figures 18a, 18b. Proximal and distal ends of the third phalanx of digit V: 



radial side. 

 Figure 19. Fourth phalanx of digit V ; radial side. 



