THE SKULL 



95 



FIG. 77. SKULL OF A WILD DUCK (Anas boschas). A, from above ; B, from 

 below ; C, from the side. (From a preparation by W. K. Parker). 



a.l.s, alisphenoid ; ag, angular ; ar, articular ; a.p.f, anterior palatine foramen ; 

 b.t, basitemporal ; b.o, basioccipital ; b.pg, basipterygoid ; b.s, basisphenoid ; 

 d, dentary ; e.n, external nostrils; eth, ethmoid; e.o, exoccipital ; e.u, 

 Eustachian aperture ; fr, frontal ; f.m, foramen magnum ; i.c, foramen for 

 internal carotid artery ; j, jugal ; Ic, lachrymal ; mx.p, maxillopalatine 

 process ; mx, maxilla ; n, nasal ; n.px, nasal process of the premaxilla ; px, 

 premaxilla ; p, parietal ; ps, presphenoid ; pg, pterygoid ; pi, palatine ; p.n, 

 internal nostrils; q, quadrate; q.j, quadratojugal ; ?q, squamosal ; s.o, 

 supraoccipital ; ty, tympanic cavity ; v, vomer ; //, foramen for optic nerve ; 

 F, for trigeminal ; IX, X, for glossopharyngeal and vagus ; XII, for 

 hypoglossal. 



