Hatcher: Fork Limp, and ISIaxus or liRONTOSAURUs. 801 



fore and aft is ciuitc short. In llie |)resent specimen the differences 

 between these two diameters is somewhat magnified through distortion 

 due to crushing. Superiorly the jjroximal end is regularly convex, so 



Fir,. I. Anterior view of right hutnerus, about one tenth natural size. (No. S^3-) 



that when seen from behintl or in fiont its upper border describes an 

 almost perfect arc, the chord of which in the present specimen has a 

 length of 600 mm. (2353 inches). The head is placed about midway 

 between the external and internal borders, but a little nearer to the 

 latter, and is directed rather strongly backward much as in the testudi- 

 nata. It is very rugose, only moderately expanded in either direction. 



