NEW REPTILES FROM THE UPPER TRIAS 



689 



the inferior border of the shaft of the scapula.T The anterior part of 

 the coracoid, though preserved, has not yet been fitted to the remain- 

 der of the bone; it is rather thick, and seems to have been directed 

 strongly inward. No traces of a supracoracoid foramen, nor of any 

 connecting sutures are visible in the united bones. 

 Humerus (Fig. 2). — The _ _ 



it 



left humerus, found associ- 

 ated with its corresponding 

 coraco-scapula, is a remark- 

 able bone. The head is 

 thickened, the shaft curved 

 forward and compressed, 

 the condyles have a long 

 articular sweep and are 

 obliquely placed. The dor- 

 sal surface proximally is con- 

 vex from side to side below 

 the slightly prominent head, 

 the lateral or deltoid pro- 

 cess forming a long, back- 

 wardly curved margin. On 

 the palmar side the surface 

 is concave, and the head is 

 more prominent, the slightly 

 convex articular surface 

 looking mesad and ventrad. 



The shaft, distad to the lower end of the deltoid process, is strongly 

 compressed from side to side, with a considerable convexity in front. 

 The condyles stand far backward, the inner one more prominent and 

 slightly longer than the outer one. They are also obhquely placed, 

 so that, when resting on a plane, the plane of the upper part is not 

 more than thirty degrees from the vertical. 



The external condyle extends through nearly three-fourths of a 

 circle; the trochlear groove is deep and narrow. On the outer side, 

 a little above the end, there is a thickened, rounded projection, par- 

 tially separated from the shaft by a groove ; it perhaps corresponds to 

 the supinator ridge. The bone has no internal cavity. 



Fig. I. — Left coraco-scapula 

 Dolichohrachium gracile. 



of 



