114 Baron F. Nopcsa — On Stegosaurm priscus, sp. nov. 



The middle caudal vertebrae (Fig. Id) of St. priscus have the neural 

 spine more elevated than in 0. armatus, but not cleft at the top as in 

 St. ungulatus. The section of the rod-like neurapophysis is triangular 

 at the base, but oval and somewhat laterally compressed at the summit. 

 The post-zygapoph3'Ses are not much elevated above the neural canal, 

 they are directed both straight downward and outward. The pre- 

 zygapophyses are correspondingly directed upward and outward. The 



FIG. 3. a. First (?) caudal of St. priscus. b. Proximal caudal of the same, 

 c. Anterior view of distal caudal, d. Lateral view of the same. 



moderately short centra of these vertebrae are concave at both ends, 

 more so posteriorly than in front ; the sides are flat, the bottom keeled, 

 the articular surfaces for the chevron bones large, equally developed 

 at both ends, and nearly touching each other on the basal ridge. They 

 are not easily distinguishable from the rugosities that occur round the 



