STRUTHIOXES 



517 



run forward in a straight course. The maxillo-palatines 

 articulate with the vomer. 



The axial skeleton has been described in the greatest 

 detail by MiVAKT. 1 



There are twenty cervical vertebra;., and then five which 

 have ribs articulating with the sternum. The atlas is more 

 simply ring-like than in other birds ; it has a very wide notch 



il 



FIG. 247. PELVIS OF CASSOWARY (AFTER MIVAKT). 



pl, pelvic rib. Other letters as in fig. 243. 



for the odontoid process of the axis. The catapophyses of 

 the seventeenth cervical unite. 



The sternum has a raised and flattened tract posteriorly, 

 which may be the equivalent of the keel ; it has two posterior 

 lateral processes, which extend beyond the median portion of 

 the bone. 



1 ' On the Axial Skeleton of the Ostrich,' TV. Z. S. viii. p. 385. 



