Plate XLIII. 



Fig. i. Left femur of Pteranodon ingens, somewhat obliquely compressed, 

 from in front showing dermal markings. One-half natural size. 



Fig. 2. The same, posterior surface. One-half natural size. 



Fig. 3. The same, distal end. One-half natural size. 



Fig. 4. Right femur of Nyctosaurus gracilis, from in front. Natural size. 



Fig. 5. The same, from behind. Natural size. 



Fig. 6. Left coraco-scapula of Nyctosaurus gracilis; s, scapula; c, cora- 

 coid; a, process of scapula. Natural size. 



Fig. 7. First dorsal vertebra of Nyctosaurus gracilis, from in front. Twice 

 natural size. 



Fig. 8. Eighth cervical vertebra of Nyctosaurus gracilis, as compressed, 

 obliquely from behind: s, spine; b, ball; d, diapophysis; e, exapophysis. Twice 

 natural size. 



Fig. 9. Metatarsal of Nyctosaurus gracilis. Natural size. 



Fig. 10. Right distal carpal of Nyctosaurus gracilis, obliquely from behind. 

 Natural size. 



Fig. 11. Proximal caudal or caudo-sacral vertebra of Nyctosaurus gracilis, 

 from above. Natural size. 



