REPTILIA : TRISPONDYLUS 133 



save that the ectepicondyle is eroded away. The median process 

 on the dorsal side near the proximal ulnar angle is very pronounced, 

 rounded, and roughened. The ventral radial plane of the lateral 

 process, looking ventrad, laterad, and distad, is flat and separated 

 from the dorsal surface by a very distinct angular ridge, very 

 characteristic of this genus and of Casea. The entocondyle extends 

 nearly to the full length of the bone, and is thickened, not ending 

 considerably before the distal extremity of the bone, and thin, 

 as in Casea. The hemispherical capitellum is extended into a 

 rounded protuberance on the outer distal side of the convexity. 

 The right ulna was found attached to the humerus rectangularly; 

 a small part of the middle of its shaft is missing. It is a stout bone, 

 with a well-developed olecranon, the distal extremity expanded 

 and thickened, and nearly semicircular in outline. The right 

 radius, found connected with the proximal carpals, is nearly 

 straight on its outer side, deeply concave on the ulnar border. 

 The proximal end is transversely truncated, oval in outline and 

 gently concave, the distal border rather broad, thinned on its 

 ulnar margin. This bone, like the ulna, is concave on the ventral 

 side, nearly straight on the dorsal. The carpals of both sides are 

 preserved in part, those of the proximal row in position, as also 

 the first centrale and the first two carpalia; three other carpalia 

 cannot be positively located; the bones of the fourth finger are 

 articulated. I locate the bones of the wrist and hand in the figure 

 as it seems they should go, those unknown or doubtfully known 

 uniformly shaded. The radiale is small but thick, nearly triangular 

 in shape on the dorsal side. The intermedium is unusually large; 

 its position as regards the radius is shown in the figure as it is 

 preserved in the right wrist. The ulnare is short. I am not sure 

 but a little of the lower margin is gone, as it is figured. The 

 metacarpals and phalanges are very stout, as are also the claws. 



Of the right innominate, the ilium, the whole of the acetabulum, 

 the larger part of the pubis, and a part of the ischium are preserved 

 attached to the sacral ribs. The pubis and ischium appear to be 

 very much like those of Casea; the pubis is surely not of the 

 clepsydropid type. The ilium, however, is quite unlike that of 

 Casea, in that it is prolonged backward and not at all forward, 



