113 



Ccaises of Chronic Roaring. 



part of the cartilage itself, and so still further decreasing 

 the glottal space at the pars respiratoria, as well as at the 

 adiius. Consequently, the greater the volume of air enter- 



FlG 7_yiEW OF THE LARYNX OF A HORSE AFFECTED WITH EOAR- 

 'iNG DURING EXTREME INSPIRATION, SHOWING THE DIFFERENCE 

 IN POSITION OF THE RIGHT AND LEFT ARYT.ENOID CARTILAGES 

 AND VOCAL CORDS. 



a, Epiglottis, hb, Arytenoid cartilages, the right being pulled out- 

 wards and upwards, while the left (dark-shaded) i« beyond the cada- 

 veric position, cc, Vocal cords : the right is drawn close to the side ot 

 the larynx, while the left remains in the middle line, and diminishes 

 the aperture of the glottis, d. ee. Ventricles of the larynx. 



ing the pharynx from the nasal passages, the less will pass 

 through the larynx, owing to its distending this pouch and 



8 



