Plate XII. 

 Ligation of the Parotid Duct. 



Fig. I. Segment of the left ramus of the in- 

 ferior maxiHa of the horse seen from the right 

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

 ternal maxillary artery ; z>, external maxillary 

 vein ; st, si, parotid duct. 



Fig. 2. Life size of operation field on external 

 side of maxilla ; a, external maxillary artery ; z\ 

 external maxillary vein ; .s7, parotid duct ; ;;/. 

 masseter muscle. 



