GIANT LAND REPTILES OR DINOSAURS. 127 



Fig. 37, it will at once be apparent that we have to do 

 with a widely different type of structure. Thus we 

 notice, in the first place, that the haunch-bone extends 

 but a comparatively short distance in front of the cup 



FIG. 37. Left side of the pelvis of Megalosaur. One-twelfth natural size. 

 Letters as in Fig. 36. (After Marsh.) 



for the head of the thigh-bone. Then, again, and this 

 is by far the most important feature the pubis is 

 directed forwards instead of backwards, and thus, 

 instead of lying parallel with the ischium, is placed 

 at a very open angle to that bone. This form of 



