48 ROARING IN HORSES. 



the external part of the arytenoid immediately 

 in front of the cricoid (^<g. 13) ; and a saw- 

 like movement Is made with a certain amount 

 of pressure, always taking care that It does 

 not slip. When the arytenoid Is partially 

 ossified (In nearly half the cases) It Is 

 necessary to use force. A sensation that the 

 resistance Is overcome and that there Is a 

 great deal of movement of the cartilage, 

 which is easily displaced in all directions, 

 indicates that the section Is complete. 



Moller cuts the arytenoid from within 

 outwards, fixing It by applying the Index 

 finger of his left hand to Its external surface. 



{d) The upper face of the arytenoid Is 

 dissected with the curved scissors, the car- 

 tilage Is lifted by forceps, and under the 

 posterior portion is passed the extremity of 

 the scissors, the handles of which are held 



