62 THE ROYAL SOCIETY OF CANADA 



minimum girth of 135 mm. The ulna is about 340 mm. between 

 articular surfaces; the minimum girth is 170 mm., the width distally 

 85 mm. and proximally about 160 mm. 



The sternal bones are similar to those figured by Brown for 

 Monoclonms nasicornis. The outline, however, is less quadrangular 

 and the thin inner edges do not seem to have been so continuously 

 in apposition. The bones are 340 mm. long, 120mm. wide posteriorly 

 and 80 mm. anteriorly. The maximum thickness of the outer edge is 

 20 mm. The sternals are slightly longer and distinctly narrower than 

 those of Monoclonius nasicornis. 



The manus (Plate V, Fig. 5) conforms to the general type but 

 there are some differences in proportions, as shown by the following 

 table : 



