626 PROF. H. G. SEELEY ON THE DINOSAURIA OF 
surfaces, which in front are cupped and behind are flattened. The 
angle of inclination of the articular faces is about 55°. The length 
of the centrum along the neural canal is fully 2 inches. The mar- 
gins of the articular faces are worn. The centrum is compressed from 
side to side, and at the base the sides round together. The trans- 
verse process is given off on a level with the base of the neural 
canal as usual, but is broken, and only a small fragment of the 
neural arch is preserved, so as to arch over the spinal cord in front, 
forming a foramen about 55, inch in diameter. Above the transverse 
process the neural arch is somewhat pinched in, as is the centrum 
below. ‘The depth from the neural canal to the base of the centrum 
is about 1,8, inch; the width from side to side is about 1,4, inch. 
The base of the articulation posteriorly is truncated by an oblique 
triangular facet for the chevron bone; but it is uncertain whether 
this condition also marks the anterior facet. A vertebra is probably 
missing from between the second caudal and the third ; for the third, 
fourth, and fifth become rather more elongated, the third (fig. 8) 
measuring 2,4, inches long. It is more compressed from side to 
Fig. 8.—Third Caudal Vertebra of Syngonosaurus macrocercus, 
nat. size. 
a. Right lateral view. b, Posterior view. ce, Anterior view. 
