Dr. A. Smith Woodicard — A Triassic Reptile from Brazil. 253 



boss {t.), for the articulation of the tuberculum of the rib already- 

 mentioned. It is thus evident that the rib must have been stout, 

 deep, and antero-posteriorly compressed at its double-headed upper end. 

 One of the most imperfect vertebral centra is essentially identical 

 with that just described, showing a similar rib - articulation and 

 a space for a wedge-bone. The other good specimen (Figs. 2, 2a.), 

 however, is somewhat smaller, with no clear indication of a facette on 

 the centrum either for a rib or for a wedge-bone. Its articular ends 

 are slightly concave. The base of its neural arch seems to show that 

 it agrees with that of the other vertebra in being fused with the 

 centrum, while the neural canal similarly forms a shallow groove. 



A 



n.a 



Fig. 2. — Dorsal vertebra, anterior aud right lateral (a) aspects, f nat. size. 



The first type of vertebra (Fig. 1) obviously belongs to the cervicaU 

 while the second (Fig. 2) must be referred to the dorsal region. If, 

 therefore, these specimens represent one and the same individual, the 

 neck inust have been comparatively large and stout, doubtless for the 

 support of a heavy head. 



The digit of four phalanges (Figs. 3, 3a.) is interesting on account 

 of the shape of the claw. The ungual phalange is laterally com- 

 pressed and unsymmetrical, the left or less deep side being flattened 

 or almost hollowed, while the other side is slightly convex. The bone 

 is not marked by any lateral groove, but its lower face is considerably 

 excavated and has a sharp rim. The two phalanges following the 

 ungual are short and broad, and much constricted round the middle. 

 The next bone, which perhaps admits of more than one interpretation, 

 is more elongated than those just mentioned, but not so long as the 

 ungual. It seems to be displaced in the fossil, being, in fact, 

 accidentally turned on its long axis to an extent of 45°, so that 

 its imperfect right side only is seen in Fig. 3, its left side in Fig. 3a. 

 If this interpretation be correct the bone is another phalange, with 

 the saddle-shaped proximal articular face somewhat deeper than wide. 



