XI. 



GET EOS A UR US VERTEBRM. 



259 



tremities of the diapophyses, 12 inches. The neural spine is 

 broken ; probably it rose twelve inches above the canal and was three 

 inches broad ; the zygapophyses are not to be completely traced ; 

 the posterior ones are shallow concavities, as in the drawing of 

 Owen, Pal. Soc. Mem., Plate X. The articulating surfaces for the 

 hsemapophyses are large and rough : both margins shew these, but 



Diagram LXXXIX. Scale one-tenth of nature. 



i. Anterior caudal vertebra of ceteosaurus, seen on the right side. 2. The same, 

 seen from behind. 3. The same, seen from beneath. zz f . Zygapophysial processes. 

 Haemapophysial spines or chevron bones are seen below. The arrow points from the 

 head. 



chiefly the posterior, in which they are distinctly separate, in the 

 anterior less so. There are several of these vertebrae less complete. 



Another vertebra removed farther back, so as to be nearly at 

 half the length of the tail (retaining the reduced mark of the 

 diapophysis), measures asunder : Length, 5-8 inches ; breadth, 6-0; 

 height, 6-5 ; concavity of articular faces, 0-5. The neurapophyses 

 occupy above half the length ; posterior space largest. 



