PEOZEUGLODON. 
20 3 
'0;Teatly elongated from above downwards, their upper ends running out on projecting 
plates of bone, the summits of which are nearly on a level with the upper border of the 
neural arch, with the anterior edge of which they are united by narrow bars of bone, 
Text-fig. 83. 
t.p. 
Anterior cervical vertebroe o£ Prozewjlodon alrax: A, atlas from fi’ont ; B, axis from front ; 
C, third cervical from front ; D, the three anterior cervicals articulated with one another, from left side. 
at., lateral surface for atlas ; a.z., anterior zygapophyses ; cond., condylar cups of atlas ; ep., epipby.sis of 
centrum ; hyj)., hypapopbysis ; n.sp., neural spine ; od., odontoid process ; jj.r., posterior zygapophyses ; 
sp.n., passage for first spinal nerve ; t.p., transverse process ; v.c., vertebrarterial canal. | nat. size. 
enclosing a pair of large foramina for the first spinal nerve {sp.n.). The articular surfaces 
are strongly concave from above downwards and slightly so from side to side. They 
