40 



NEW EEPTILES AND STEGOCEPHALIANS FROM 



with it, in the present specimen, begins the elevation of the sides of the neural arch which 

 is so notable in Desmatosuchus. The neural spine is lost, but the space between the 

 zygapophyses is much narrower. The centrum is narrower and more elongate, with 

 the base rounder and the faces more nearly round. . ,, , , , 



From the fourteenth back to the twenty-fourth (?) the vertebrae are of the true dorsal 

 series (fig 12). The transverse processes increase to their maximum length and are 

 inclined slightly backward, the capitular faces gradually come to lie on the anterior 



Fig. 12. — Desmatosuchus spurensis. All figures X 0.3. 



A. Anterior view of a mid-dorsal vertebra. 



B. Posterior view of A. 



C. Lateral view, left side of A. 



D. Upper view of A. 



E. Lateral view of a posterior dorsal vertebra with the 



rib of left side attached. 



F. Posterior view of E. 



G. Upper view of a posterior dorsal. The broad apex is 



broken off. 



side of the transverse processes, and the supporting ridges become obsolete on the face 

 of the elevated neural arch. The neural spines become more elongate antero-posteriorly 

 and the apex is expanded abruptly into a rounded rugose table. The centra become 

 elongate antero-posteriorly, and the edges of the faces flare out so that the lower face is 

 concave antero-posteriorly and convex from side to side. 



