CEYPTOCLEIDUS OXONIENSIS, 



173 



roughened pits on the inner face of the upper end of the ilia in very old individuals, 

 it seems possible that they did so, at least in advanced life. The centra in the sacrals 



Text-fiff. 83. 



Sacral vertebra of Cryptocleidus oxomeiisis : A, from front ; B, from below. (E. 2412, | uat. size.) 

 n.c, neural canal ; s.f., facet for ilium ; «.?•., sacral rib. 



Text-fig. 84. 



B. 



n.s. 



Anterior caudal vertebra of Cnjptodeidus oxoniensis: A, from behind ; B, from left side. 



(R. 2412, i nat. size.) 



c./., facet for chevron-bone ; c.r., caudal rib ; n.c, neural canal ; n.s., neural spine ; ^>.r., posterior zygapophysis. 



become slightly depressed, and pass posteriorly into the transversely oval centra of the 

 anterior caudals (text-.Hg. 84). In the sacral region the neural spines begin to decrease 



