XIII. 



STENEOSAURUS GRACILIS. 



387 



Two other cervical vertebrae have been observed, both carinated 

 below. Each has two transverse processes, the upper one descending 

 from above the suture, the other running backward from the 



Diagram CLXXXIX. Steneosaurus gracilis. Scale one-tenth of nature. 



I. Lateral view of atlas and axis vertebra, conjoined by bony suture. The basal 

 and lateral elements of the atlas (of the superior element is only a trace), and what 

 represents the odontoid process, make an anterior ring which is united by bony 

 suture to the true axis. To the former ring are attached the first styliform 

 processes, to the true axis the second. 2. The front view of the bone ; the central 

 part is not usually regarded as a part of the atlas, but is united with it, and forma 

 the concavity. The styliform processes are shewn. 3. A cervical vertebra, seen 

 laterally. 4. The same, seen in front. 5. Another vertebra of the same general 

 type, probably the first dorsal, seen laterally. 6. The same, seen in front, with 

 the probable ribs. 7. The same, seen from below, to shew the carination. 8. The 

 lower surface of the head, as seen in the specimen from Shotover. 9. Lower jaw, 

 seen from above. 10. Lower jaw, seen from the outside. 



anterior edge. The body is oval in contour, higher than broad, 

 concave on both faces, most so on the hinder surface ; one is marked 

 with a central pit. 



Length, 1-5 inch; height, 1*5; breadth, 1*3 on the average 

 of the two vertebrae. 



c c 2 



