SKELETONS OF BIRD AND REPTILE 



27 



very little way forward and a long way backward, a 

 slender bar of bone, united for part of its length with 

 the Ischium. To discuss here whether this is all 



IL 



--W- 



~D^ V 



Fig. 8.— Left side of Pelvis (a) of Lizard ; (/>) of Bird. 



A, acetabulum ; 11., ilium ; is, ischium ; PB, pubis ; v, vertebrae fused. 



In (a) the ischium and pubis slope inwards to meet their fellows from the opposite 



side. In (/>) all three bones are fused where they meet. The ilium extends forwards 



as well as backwards from the acetabulum. 



Pubis proper, or whether a pubic " process " has 

 been added, would be out of place. The term 

 process, meaning an out-growth, is a favourite one 

 with anatomists, and is often useful as a name, 

 though, it must be owned, it does not explain much. 



