Osteology of the Numididse. 



343 



equally and strongly developed for the support of the ilia. 

 The vertebral column, however, of this bird showed a feature 

 which I have not observed in any examples of either of tlie 

 species between which it is a hybrid. There were five instead 

 of only four fused vertebrae in the dorsal region, and an 

 additional rudimentary rib (without an uncinate process) on 



Fio-. 



Pelvis of Gallus hanAira. 

 (Dorsal aspect, § nat. size.) 



the free vertebra in front of these. There were thus 8 pairs 

 of ribs instead of 7. 



The sternum (fig. 5, p. 342) is intermediate in its charac- 

 ters. The anterior lateral processes are broader than those 

 of Gallus, but not so broad as those of Numida. They also 

 tend to run parallel to the coracoids, but not to so marked 

 an extent as in Gallus, nor are they so long as in that genus. 



