300 



STRUCTURE AND CLASSIFICATION OF BIRDS 



The interorbital septum is more fenestrate than in the Mega- 

 podes, but still not markedly so. 



The Galli have sixteen cervical vertebrae. In Gallus 

 bankica the catapophyses of vertebra 10 nearly enclose a 

 canal ; on the next vertebra the two processes have almost 

 fused into a single one, the two processes being closely 



Pmx. 



FIG. 151. SKULL OF Cra.v globiccra. SIDE VIEW. (AFTER HUXLEY.) 

 /'/.?-, premaxilla ; />', nasal septum. 



soldered together for their whole length, and not, as is so often 

 the case, divergent at the end. All the remaining cervical 

 vertebrae have strong median haemapophyses, those of the 

 sixteenth being fused with the two following at their ex- 

 tremities (cf. Musophaga, p. 285). The last cervical vertebra 

 and the three anterior dorsals are themselves fused. 



It will be simpler to compare the vertebrae of Gallus 

 with those of some other Galli by means of the following 

 table : 



Bifid at end. 



