Plate IV. 



Figure 1. — Composite restoration of the skull of Pteranodon, based on the type of P. 

 ingens Marsh, No. 2594, and on Pteranodon sp., No. 2473 ; seen from the left 

 side, x 0.14 



Figure 2. — Restoration of the skull of the type of P. ingens Marsh, No. 2594 ; palatal 

 view, x 0.50 



