6o 4 



BIRDS. 



the rostrum are the pterygoids, in front of these lie the pala- 

 tines, between which a part of the vomer may be seen. 

 The bony front of the palate is formed from inward exten- 



sions of the premaxillae and maxillae. The inter-orbital 

 septum is formed chiefly from the mesethmoid but also from 

 the presphenoid. From the tympanum to the inner ear 



