652 PROF. H. G. SEELET ON [Allg. I9OO, 



The Scapula. 



The right scapula is exposed resting in part upon the early 

 dorsal ribs, its under side being concave, corresponding to their 

 curvature. The bone is 3| inches long, with a strong humeral 

 articular surface, which is an inch deep and nearly as wide. This 

 thickened condition is prolonged up the posterior edge of the bone, 

 which is convex in length from above downward as well as laterally, 

 diminishing in thickness to J inch at its superior termination, 

 forming a distinct ridge along the posterior margin. On this 

 posterior border, a little above the articulation, is a narrow muscular 

 impression about | inch long, which is much lower in position than 

 the muscular impression on the scapula referred to Ptychosiagum 

 orientate from the Panchet rocks (which may also prove to be a 

 Theriodont), and more like the condition in Theromus leptonotus. The 

 bone is constricted above the humeral articulation, and emarginate 

 anteriorly below the acromion-process. The exact amount of the 

 constriction is not shown, owing to the condition of the matrix. 

 Beyond the emargination the bone rapidly widens transversely to 

 1 inch at the acromion, and ultimately to fully Ik inches, forming a 

 smooth flattened surface, slightly concave from side to side, with 

 the concavity slightly augmenting as it descends the length of the 

 bone, and ultimately it curves forward on to the anterior side of the 

 bone above the humeral articulation. The superior margin of the 

 scapula is convex from front to back, and moderately thin, like its 

 anterior margin. There is no trace of a spine upon the blade of the 

 scapula, as in most mammals, or as in Cynognathus. Moreover, the 

 slab is fractured, so that the blade is not quite perfect, and there are 

 no indications of the other bones of the shoulder-girdle. 



The Humerus. 



The right humerus was probably 4 inches long, but its proximal 

 end is not exposed, or rather is lost with the longitudinal fracture 

 of the slab. The distal end and part of the radial crest are well 

 displayed ; but the bone is inverted in position, so that the radial 

 crest is directed upward. 



The crest is compressed, thin, continuous with the radial side of 

 the bone, convex in its lower longitudinal contour, and not extend- 

 ing for more than half the length of the humerus. Below the 

 termination of the crest the shaft narrows to a width of | inch, the 

 measurement becoming less as the concave sides approximate in a 

 rounded median convexity which marks the distal disappearance of 

 the radial crest. The thickness of the shaft in this position is 

 about equal to its width. The width rapidly augments by widening 

 on both sides to 1£ inches at the distal end. The external margin of 

 the bone continues thick, though the thickness diminishes to the 

 condyle, and the lateral contour is deeply concave ; but on the inner 

 border of the bone its concave lateral contour terminates at 1 \ inches 

 from the distal end. Below this point the border becomes com- 

 pressed and nearly straight, and extends inward beyond the articular 



