BRITISH FOSSIL CRETACEOUS BIRDS. 511 



Fig. 4. Inferior aspect of occipital and sphenoid bones, showing the anterior 

 divergence of the squamosal bones : a, suture between parietal and 

 frontal bones ; b, brain-cavity ; c, foramen magnum ; d, area from 

 which the basitemporal bones have come away ; e, articulation for 

 the quadrate bone ; f, basisphenoid. 



5. Basal aspect of a cervical vertebra of Enaliornis Barretti in the collec- 

 tion of W. Keed, Esq., F.G.S. 



G. Anterior aspect of the same specimen : a, anterior articulation ; b, pos- 

 terior articulation. 



7. Left side of dorsal vertebra of Enaliornis Barretti in the Woodwardian 



Museum. 



8. Neural aspect of the same specimen. 



9. Visceral aspect. 



10. Posterior aspect. 



11. Anterior aspect: a, anterior articular surface; b, posterior articular 



surface ; c, tubercle for rib ; d, transverse process ; e, neural spine ; 

 /, neural canal; g, anterior zygapophysis. 



12. Anterior aspect of dorsal vertebra of Enaliornis SedgivicJci in the 



Woodwardian Museum. 



13. Lateral aspect of the same specimen. Lettering as in previous figure. 



a, the concave anterior face of the centrum. 



14. Visceral aspect of anterior portion of the sacrum of Enaliornis Barretti 



in the Woodwardian Museum, showing the nearly flat anterior ar- 

 ticulation of the first vertebra. 



15. Visceral aspect of middle portion of sacrum of Enaliornis Barretti in 



the Woodwardian Museum. 



16. Lateral aspect of the same specimen. 



17- Anterior end of postfemoral portion of sacrum of Enaliornis Barretti 

 in the Woodwardian Museum. 



18. Visceral aspect of the same specimen. 



19. Lateral aspect of the same specimen. 



20. ? Caudal vertebra of Enaliornis Barretti in the Woodwardian Museum. 



21. Posterior aspect of same specimen. 



22. Anterior aspect of same specimen. 



23. Portion of pelvis around the acetabulum of Enaliornis Barretti in the 



Museum of Practical Geology : a, ilium ; b, pubis ; c, ischium. 



24. Distal end of right tibia of Enaliornis Barretti in the Woodwardian 



Museum. 



25. Distal view of the articulation of the same specimen. 



2G. Proximal view of the articulation of a fibula of Enaliornis Barretti in 

 the Woodwardian Museum. 



27. Lateral view of proximal portion of another specimen of the same spe- 

 cies in the Woodwardian Museum. 



Plate XXVII. 



Fig. 1. Anterior aspect of a left femur in the collection of T. Jesson, Esq., 

 F.G.S. 



2. Inner view of the same specimen. 



3. Outer view of the same specimen. 



4. Proximal end of a femur, probably of Enaliornis Barretti, in the Wood- 



wardian Museum. 



5. Proximal articulation of the same specimen. 



6. Proximal end of a small femur, possibly Enaliornis Sedgwichi, in the 



Woodwardian Museum. 



7. Proximal articulation of same specimen. 



8. Anterior view of distal end of left femur of another species of bird in 



the Woodwardian Museum. 



9. Posterior aspect of distal end of left femur of Enaliornis Scdgwicki in 



the Woodwardian Museum. 

 10. Anterior aspect of same specimen. 



Q. J. G. S. No. 128. 2 n 



