SKULL 



121 



?n 



_ atesq 

 * * /, 



FIG. 88. SKULL OF A WILD DUCK (^4a-s boschas). A, from above ; B, from 

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



ag, angular : als, alisphenoid ; a.p.f, anterior palatine foramen ; ar, articular ; 

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

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

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

 internal carotid artery ; j, jugal ; Ic, lacrymal ; mx, maxilla ; mx.p, 

 maxillopalatine process ; n, nasal ; n.px, nasal process of the premaxilla ; p. 

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

 px, premaxilla ; q, quadrate; q.j, quadrato- jugal ; s.o, supraoccipital ; sq, 

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

 V, for trigeminal ; IX, X, for glossopharyngeal and vagus ; XII, for hypo- 

 glossal. 



