THE LARYNX. 131 



It is a very small fasciculus, and sometimes only one muscle 

 exists. 

 Use, to close the chink of the glottis. 



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7. The Arytenoideus Transversus is always a single muscle, 

 which arises posteriorly from the whole length of one aryte- 

 noid cartilage, excepting a little part of the tip, and is inserted, 

 in a corresponding manner, into the other. It fills up the cylin- 

 drical concavity of the arytenoid cartilages. 



Use, to close the chink of the glottis. 



8. The Thyreo-Epiglottideus consists in a few fibres, and 

 arises from the posterior face of the thyroid cartilage near its 

 entering angle. It is inserted into the side of the epiglottis. 



Use, to draw the epiglottis downwards. 



9. The Aryteno-Epiglottideus consists also in a few indistinct 

 fibres, and arises from the superior lateral parts of the aryte- 

 noid cartilage. It is inserted into the side of the epiglottis. 



Use, to draw the epiglottis downwards. 



These two last muscles are generally so small and undefined, 

 that they cannot be satisfactorily distinguished from the adja- 

 cent soft parts. 



On the posterior face of the thyroid cartilage, of the middle 

 thyreo-hyoid ligament ; and on each side of the epiglottis carti- 

 lage, surrounding its lower part with the exception of its poste- 

 rior face, there is an accumulation of cellular and adipose sub- 

 stance. In the lower part of this substance there are several 

 small glandular bodies, sometimes insulated and sometimes col- 

 lected together, which detach their prolongations into the fora- 

 mina of the epiglottis cartilage, and seem to open thereby on 

 its laryngeal surface; they are mucous glands. 



The Arytenoid Gland, which is also muciparous, is situated in 

 front of the arytenoid cartilage, in the duplicature of the mu- 

 cous membrane which passes from the side of the epiglottis 

 cartilage to the arytenoid. It is a small body of a grayish co- 



