Plate ix. 

 Ligation of the Parotid Duct. 



Pig, I. Segment of the left ramus of the in- 

 ferior maxilla of the horse seen from the right 

 and beneath, sp, usual operative field ; a, ex- 

 ternal maxillary artery ; v, external maxillary 

 vein ; st, st, parotid duct 



Fig. 2. Life size of operation field 3\.sp, fig. i; 

 a, external maxillary artery ; v, external maxil- 

 lary vein ; st, parotid duct ; m, masseter muscle. 



