682 



PROF. H. Gr. SEELEY ON THE REPTILE 



the transverse width of the bone to about 8 centim., thus giving to 

 the head of the bone a blunt wedge-shaped aspect ; a concavity com- 

 pletely separates the tuberosity on the inferior surface from the 

 articular head. Unfortunately I have not found it possible to clear 

 away the matrix from the inferior surface, except so far as was 

 necessary to show that there was a concavity behind the radial crest. 

 The radial side of the bone is flattened, but a little concave from side 

 to side on its external aspect. It forms a considerable angle with 

 the superior face of the bone, from which it is divided by the ridge 

 or tuberosity which formed the ball-like part of the articulation ; 

 though this ball is fractured, it was placed conspicuously towards 

 the radial side ; and beyond it is a longitudinal concavity. The 

 fragment is only about 7| centim. long, and the fracture is not sharp; 

 but it shows that the shaft was becoming remarkably flattened and 

 compressed, especially towards the ulnar side. 



The specimen thus presents a very marked difference from the 

 humerus of Anojploscmrus, and is unlike that of any other genus, 

 especially in the constriction which defines the ulnar tuberosity and 

 in the angle which it makes with the head of the bone. 



There is a small fragment which might well be a part of the 

 middle of the shaft of this specimen, too imperfect for description ; 

 but if it really pertained to this bone, it may be interesting as show- 

 ing a thickness of nearly 2| centim. 



A third fragment, very imperfectly preserved, I am disposed to 

 regard as the distal end of the right humerus, though it is so imper- 

 fect that I cannot speak confidently on the matter. It only shows 

 one cond} T le, which is almost globular, with the flattened lateral 

 margin of the bone and a small adjacent part of the superior surface 

 of the shaft. This condyle, however, is remarkably massive, is 

 rounded, less than 4 centim. thick, and 4J centim. wide, with a 

 rugous articular surface extending internally parallel to the external 

 lateral surface of the bone, and indicating, if I have correctly guessed 

 the nature of the fragment, that the ulna developed a process received 

 between the condyles in an unusual manner. The bone was evidently 

 concave from side to side in front and greatly compressed between 

 the condyles, very much as Mr. Hulke has represented in Hylazo- 

 saurus ; it was thick on the ulnar side, and evidently more com- 

 pressed on the radial side. 



Articular ends of Scajpulce. 



The scapulae are fractured so that the entire blade of the bone is 

 lost as well as the articular surface for the coracoid ; so that nothing 

 remains but the articular region. The left scapula is rather more 

 perfect than the right. The specimens have, at first sight, rather 

 the appearance of articular ends of caudal vertebrae than of scapulas. 

 The left specimen shows the articulation to have been an elongate 

 ovoid with the internal margin of the articulation convex and the 

 external margin more flattened. The extreme width is 4^ centim., 

 and the length about 6| centim., as preserved. The articular sur- 



