EXPLANATION OF PLATES 



All magnifications are to be regarded as approximate 



PLATE I 



Fig. I. Skull, dorsal view, X 5- The investing bones have been removed from the right 

 side so as to reveal the primary cranium. In this and in all subsequent figures of the 

 skeleton the persisting cartilage is dotted. 



Fig. 2. 6'>^a//, ventral view, X 5. The investing bones have been removed from the right- 

 hand side (left side of figure). 



PLATE II 



Fig. 3. Skull, lateral view, X 5. 



Fig. 4. Skull seen in sagittal section showing the interior of the cavum cranii, X 5. 



Fig. 5 . Skull, occipital view, X 5 . 



Fig. 6. Hyobranchial apparatus viewed from the dorsal side, X 5. The cerato-hyals are 

 shown laterally displaced for sake of clearness. Normally their anterior ends over- 

 lap one another and lie ventral to the hypo-hyals. 



Fig. 7. Lower Jaw, mesial aspect, X 5. Left side only shown. 



PLATE III 

 Fig. 8. Lower Jaw, lateral aspect, X 5. Right side only shown. 

 Fig. 9. Lower Jaw, dorsal aspect, X 5. Right side only shown. 

 Fig. 10. "" Atlas' Vertebra, seen from the side, X 5. 

 Fig. 1 1 . "" Atlas' Vertebra, anterior view, X 5 . 

 Fig. 12. Second and Third Vertebrae, seen from the side, X 5. 

 Fig. 13. Last Presacral Vertebra, dorsal view, X 5. 

 Fig. 14. Last Presacral Vertebra, ventral view, X 5. 

 Fig. 15. Last Presacral Vertebra, seen from the side, X 5. 

 Fig. 16. Last Presacral Vertebra, anterior view, X 5. 

 Fig. 17. Last Presacral Vertebra, posterior view, X 5. 

 Fig. 18. Fourth Caudal Vertebra, seen from the side, X 5. 

 Fig. 19. Fourth Caudal Vertebra, ventral view, X 5. 



PLATE IV 



Fig. 20. Right Half of the Pectoral Girdle, viewed from the ventro-lateral aspect, X 5. 

 Fig. 21. Right Half of the Pectoral Girdle, viewed from the mesio-dorsal aspect, X 5. 

 Fig. 22. Sternum, viewed from the ventral side, X 5. 

 Fig. 23. Right Humerus, viewed from the extensor side, X 5. 

 Fig. 24. Right Humerus, viewed from the flexor side, X 5 . 

 Fig. 25. Right Ulna, viewed from the extensor side, X 5. 

 Fig. 26. Right Ulna, viewed from the post-axial side, X 5. 

 Fig. 27. Right Ulna, viewed from the flexor side, X 5. 



Fig. 28. Left Fore-arm and Carpus, viewed from the extensor (dorsal) side. The radius 

 and ulna are somewhat fore-shortened, X 5. 



PLATE V 



Fig. 29. Right Leg and Tarsus, viewed from the extensor aspect, X 5. 

 Fig. 30. Left Leg and Tarsus, viewed from the flexor aspect, X 5. 



