Peterson: Material Discovered in Uinta Basin. 57 



The fragments of the radius indicate that the head is oval, the 

 articulation with the ulna flat, the vertical groove on the anterior face 

 of the head deep and well defined. Some distance below the bicipital 

 tubercle the shaft is round-oval in cross-section. The bicipital tub- 

 ercle is large and apparently well separated from the head. 



Metacarpal V, the only bone which has been recognized as belonging 

 to the manus, is short and quite heavy. Both the head and the distal 

 end are much expanded, and the shaft has a decided forward curve, 

 especially when viewed from the ulnar side. The manus was probably 

 short and broad. 



Measurements. 



Humerus, total length of the fragment 149 mm. 



" antero-posterior diameter of shaft at lower extremity of deltoid 



ridge 27 



" transverse diameter of shaft at lower extremity of deltoid ridge. 16 



Ulna total length of the fragment 169 



" " olecranon process, anterior measurement 23 



" antero posterior diameter of olecranon process 28 



" greatest transverse " " " " 13 



Mc. V greatest length 42 



Hind Limb: A mutilated fragment of the ilium (all of that portion 

 of the pelvis at hand) has the form of a heavy trihedral bar with the 

 gluteal surface deeply excavated. A fragment of the ischium indicates 

 that the shaft of this is deep and laterally compressed. The ischial 

 spine is prominent, and terminates immediately back of the aceta- 

 bulum, as is generally the case in the Ferce. 



Both femora are represented, but they are flattened by crushing 

 and furnish few reliable characters. The shaft is rather heavy and 

 there is a third trochanter, as in the Aliacidce generally. The lesser 

 trochanter appears to be located on the postero-internal angle of the 

 shaft. The digital fossa appears to extend well down on the shaft. 



Both tibiae are represented, the left with the distal end partly pre- 

 served. The bones are crushed flat and have lost many of the original 

 characters. There is a well-marked rugosity, which extends far 

 down on the heavy shaft, indicating the position and prominence of 

 the cnemial crest. The distal end is much flattened by crushing. 

 The astragalar trochlea appears rather flat; the oblique ridge, which 

 separates the external and internal condyles of the astragalus, is light; 

 the internal malleolus is shown to be of fairly large size, and the grooves 

 for the different tendons are well developed. 



