ROOM III. HYL.EOSAURUS OWEXII. 315 



It is 4 1 feet long, and 2 feet 3 inches broad at its widest 

 extremity, but not more than two-thirds of the original mass 

 remain ; of the other third many pieces were lost, and those 

 that were preserved could not be made to fit together. The 

 portion of the skeleton displayed consists of the anterior 

 part, or thoracic region, and comprises the following bones, 

 namely : 



1st, A series of ten vertebrae, five cervical (Lign. 66. -1), 

 and five dorsal (2), adhering to the stone by their spinous 

 processes ; and of three other dorsal vertebrae, which are dis- 

 located, but lie near to each other : there are, likewise, two 

 detached dorsals in other parts of the block. 



2dly, Several ribs (3, 3), more or less displaced, situated 

 on each side of the vertebral column. 



3dly, Near the end of the fifth dorsal vertebra, two Cora- 

 coid bones (6, 6). 



4thly, Two Scapulae or Omoplates (7, 7). 



These bones are somewhat displaced, the left coracoid over- 

 lying the right, and concealing one third of its sternal portion ; 

 in fact, the left scapula and coracoid appear as if they had 

 been driven with great violence against the vertebral column, 

 and over the opposite bone, and had occasioned the removal 

 of the four dorsal vertebrae from their place. 



5thly, On the left side of the column is a series of bony 

 processes (4, 4, 4, 4), of the form of an isosceles triangle ; 

 they are irregularly disposed, yet seven of these are placed 

 somewhat in a parallel line with the vertebral column ; three 

 of the largest, and most remarkable in form (5, o, 5), lie near 

 to each other, and in a direction at right angles with the 

 former, and above the level of the coracoid bones. 



Fragments of ribs and other bones, with two dermal osseous 

 scutes, and here and there traces of lignite and vegetables, 

 and casts of freshwater shells, are observable on the face of 

 the stone which is presented to view. 



On the opposite side (which it was necessary to place in 

 cement), the ends of the spinous processes of the vertebrae 

 were visible ; and I found some interesting vegetable re- 

 mains, and extracted a fine portion of the stem of Clathraria 

 Lyellii, as well as several seed-vessels, which may have be- 

 longed to the same plant. 



Thus the specimen before us consists of a considerable 



