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 vertebrse. In Gallus 

 hanhiva the catapophyses of vertebra 10 nearly enclose a 

 canal ; on the next vertebra the two processes have almost 

 fased into a single one, the two processes being closely 



Fig. 151. — Skull of Grax globicera. Side View. (Afteb Huxley.) 

 Pmx, premasilla ; s, 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 hsemapophyses, those of the 

 sixteenth being fused with the two following at their ex- 

 tremities (cf. JfMsqp/iagra, 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 : — 



Crossoptilon mantchuricum 

 Numida cristata 

 Talegalla Lathami . 

 Megacephalon maleo . 

 Callvpepla caUfornica 

 Ptilopachys ventralis 

 Aburria carunculata . 



Bifld at end. 



