Plate V. 



Figure 1. — Left quadrate of the type of P. longiceps Marsh, No. 1177, with part of the 

 jugal; seen from below, x 1.0 



Figure 2. — Articular facet of the left mandibular ramus of Pteranodon sp., No. 2578: 

 seen from above, x 1.0 



Figure 3. — Left orbit of the skull of the type of P. ingens Marsh, No. 2594, as actually 

 preserved, x 0.50 



Figure 4. — Left quadrate and articular of Pteranodon sp., No. 2476 : seen from the left 

 side, x 0.75 



Figure 5. — Left quadrate of the same specimen ; seen from below, x 1.0 



Figure 6. — Left articular of the same specimen ; seen from above, x 1.0 



Figure 7. — Diagram of the palato-pterygoid ribbon in the type of P. longiceps Marsh, 

 No. 1177, with the associated bones of the right side; seen from below. 



Figure 8. — The same elements ; seen from above. 



Figure 9. — Restored palato-pterygoid and transpalatine of the right side in Pteranodon 

 sp., No. 2440 ; seen from above. 



Figure 10. — Skull of Chelydra serpentina (Snapping Tortoise ; Y. U. Osteol. Coll., No. 5454) ; 

 left side, x 0.66 



Figure 11. — Skull of Chamceleo vulgaris; left side; to show the temporal muscles. (After 

 Dollo.) 



Figure 12. — Skull of Plotus anhinga; superior view; showing the occipital style and the 

 origin of the temporal muscles. (After Garrod.) 



Figure 13. — Skull of Phalacrocorax dilophus (Y. U. Osteol. Coll., No. 538) : left side ; 

 showing the occipital style, x 0.50 



Figure 14. — Skull of the same ; showing the mandibular musculature. (After Yarrell.) 

 x 0.50 



