OP THE MAASTRICHT BEDS. 



247 



Eig. 1. — Right femur of Megalosaurus Bredai. (| nat. size.) 

 it. k 



l^y/jL 



A. Anterior aspect. B. Inner aspect. C. Posterior aspect. 



h, articular head ; p t, proximal trochanter restored ; 1 1, lateral trochanter. 



which becomes more angular as it ascends towards the proximal tro- 

 chanter ; but the ridge does not diverge outward much from the 

 median line. At 7 cm. (2| in.) from the proximal end the bone is 

 41 mm. (If in.) thick and 39 mm. (If in.) wide. At 13 cm. (5 J in.) 

 from the proximal end the thickness is 35 mm. (1-| in.), and the width 

 32 mm. (1^ in.). At the distal end the bone becomes more flattened, 

 and widens a little ; the thickness is 28 mm. (l^in.), and the width 

 38 mm. (1| in.) ; the increase iu distal width is chiefly a widening on 

 the inner side, which becomes vertical. The external margin, 

 though slightly concave, is nearly straight ; viewed from the out- 

 side it has an aspect proximally of broad inflation, which becomes 

 much reduced towards the distal end, chiefly owing to the increasing 

 convexity of the inferior or posterior surface. But there is a slight 

 elevation at about 8 cm. (3^ in.) from the proximal end; and the 

 external surface curves inward from this point as it extends proxi- 

 mally, forming a sharp angle with the distal part of the external 

 margin. The posterior surface in its distal half has a median 

 longitudinal rounded ridge which fades away distally, and inclines a 

 little towards the inner side of the bone. 



