THE PELVIS IN BIRDS. 



293 



The pelvis of a bird (Fig. 86), is remarkable for the great 

 elongation, both, anteriorly and posteriorly, of the iliac 

 bones (17.), which unite with the whole length of the edges 

 of the sacrum fsm.J and even extend forwards, over the pos- 



Fig. 86. — A, lateral; and B, dorsal, view of the pelvis of a Fowl. 

 Sm., sacrum; //., ilium ; /s., ischium ; /'6., pubis; ^m., acetabulum. 



terior ribs of the dorsal region. Below, each iliac bone 

 forms a wide arch over the upper part of the acetabulum (.4m.), 



