320 SIR CHARLES BELL ON THE ORGANS OF THE HUMAN VOICE. 
Fig - . 2. Represents a section of the larynx and part of the trachea. 
A. The thyroid cartilage. 
B. The cricoid cartilage. 
C. The arytenoid cartilage : on the top of it we see the surface for the arti- 
culation of the appendix. 
D. The cartilaginous rings of the trachea. 
E. The superior thyro-arytenoid ligament extending from the thyroid to the 
arytenoid cartilage. 
F. The lower thyro-arytenoid ligament or chorda vocalis. Between these 
ligaments is formed the sacculus laryngis. 
We perceive how the numerous muscles attached to the arytenoid carti- 
lage, eight in number, must affect the ligament and alter the chink of the 
glottis. 
Fig. 3. A portion of the trachea cut out to show the transverse muscle. 
A. The transverse muscle. 
