Peterson: The Osteology of Promerycochcerus. 187 



No. 1080 

 (Type) No. 1081, 

 Mm. Mm. 



Ulna, transverse diameter at inferior part of the sigmoid 



cavity 50 



Ulna, antero-posterior diameter of distal end 13 



Ulna, transverse diameter of distal end 26 



No. 1228 



Carpus, vertical diameter, radial side, approximately 45 40 



Carpus, antero-posterior diameter, approximately 30 



Scaphoid, antero-posterior diameter 30 



Scaphoid, transverse diameter 21 21 



Scaphoid, vertical diameter 25 



Lunar, antero-posterior diameter 23 



Lunar, transverse diameter 20 19 



Lunar, vertical diameter 30 31 



Cuneiform, antero-posterior diameter 19 19 



Cuneiform, transverse diameter 30 



Cuneiform, vertical diameter 19 19 



Pisiform, greatest length, approximately 34 34 



Pisiform, vertical diameter at free end 18 18 



Pisiform, smallest vertical diameter 15 15 



Trapezium, greatest vertical diameter 12 



Trapezium, greatest transverse diameter 10 



Trapezoid, antero-posterior diameter 17 



Trapezoid, vertical diameter 19 



Magnum, transverse diameter 20 



Magnum, vertical diameter 14 



Unciform, greatest vertical diameter, approximately 26 



Unciform, greatest antero-posterior diameter, approxi- 

 mately 34 



Metacarpal H, greatest length, approximately 60 64 



Metacarpal IH, greatest length, approximately 82 85 



Metacarpal IV, greatest length, approximately 77 77 



Metacarpal V, greatest length, approximately 63 63 



THE HIND LITVIB. 



The more important differences in the hind limb, when compared 

 with that of Merycoidodon, are the proportionally shorter tibia and 

 fibula and the backward shifting of the pelvis on the vertebral column. 

 This deviation from the older type is distinctly analogous to the cor- 

 responding characters in the hippopotamus. We have already seen 

 that the radius is much shorter than the humerus, that the manus is 

 broad and short, that there is a large thoracic cavity with an additional 

 dorsal, which carries a good-sized rib and has a prominent transverse 



