DESCRIPTION OF PLATE IV. 



REMAINS OF THE HYLiEOSAURUS, DISCOVERED IN TILGATE FOREST. 



Described pp. 435 -438. 

 (The original is four and a half feet in length.*) 



This plate represents the highly interesting specimen discovered in Tilgate 

 Forest, in the summer of 1832 ; it consists of the anterior portion of a skeleton of 

 the Hylceosaurus, or Fossil Lizard of the Weald, lying on the back ; the anterior 

 aspect of the bones is therefore seen in this view. 



1. Portion of the base of the cranium. 



2. Vertebrae of the neck, or cervical. 



3. Vertebras of the back, or dorsal. 



4. Ribs, for the most part perfect, and but little removed from their 



ai alation with the vertebrae. 



5, 5, 5. Dermal spines. 



6, (^6. Three very large dermal spinous processes: each 15 inches in length, 



(p. 437.) 



7, 7. Two coracoid bones (belonging to the chest). 



8, 8. The two scapulae. 



9. The glenoid cavity, or socket for the head of the arm-bone, formed by 



the union of the coracoid and scapula. 



10. Detached bones. 



* By mistake, the lithographer has inserted "inches," instead of "feet," in the 

 title of this plate. 



