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PLATE LIT. 



Fig. I. MUSCLES, &c. 



A Crico-arytenoideus posticus. 



B Crossing bands of arytenoideus. 



B' Aryteno-epiglottideus really formed by 



the crossed bands of the arytenoideus 



passing over the arytenoids into 



aryteno-epiglottidean fold. 

 C Deeper transverse portion of the 



arytenoideus. 

 D Origin of the anterior muscular band 



of oesophagus. 



E Upper border of cricoid cartilage. 

 F Crico-thyroid joint. 

 G Inferior cornua of thyroid. 

 H Superior cornua of thyroid. 



I Cartilago-triticea. 



K Cut edge of mucous membrane. 



L Fibres of the palato-pharyngeus. 



M Inferior constrictor. 



N Lateral glosso-epiglottidean bands. 



Tonsils. 



P Epiglottis. 



R Placed on the root of tongue just below 



foramen ccecum. 

 S Thyro-hyoid membrane. 

 T Placed over the great cornua of the 



hyoid bone. 

 U Thyroid gland. 

 V Posterior portion of trachea. 



Fig. II. MUSCLES 



A Arytenoideus. 



B Aryteno-epiglottideus. 



C Arytenoideus posticus. 



D Origin of the anterior muscular band 

 of oesophagus. 



E Crieo-thyroideus. 



F Arytenoideus lateralis. 



G G' Superficial fibres of the thyro-ary- 

 tenoideus. 



H Deep portion of the thyro-arytenoideus. 



I Thyro-hyoid membrane. 



J Eight ala of thyroid cartilage. 



K Great cornua of the hyoid bone. 



L Superior cornua of the thyroid cartilage. 



M Thyro-hyoid and sterno-hyoid muscles. 



Hyoglossus. 



P Articular facet for thyroid on cricoid 



cartilage. . 

 R Articular facet for cricoid on thyroid 



cartilage. 

 8 Thyroid gland. 

 T Trachea. 



V First ring of trachea. 

 Z Suspensory ligament of thyroid. 



Fig. III. MUSCLES 



A Thyroid cartilage. 



B Cricoid cartilage. 



C Crico-thyroid membrane. 



D Articular facet for thyroid cartilage. 



E Arytenoideus posticus. 



F Arytenoideus lateralis. 



G Deep portion of the thyro-arytenoideus. 



H True vocal cords, a cut edge of the 



| mucous membrane overlapping the 



right. 



I False vocal cord. 

 K Arytenoid cartilage. 

 L Arytenoideus. 

 M Ventricle of the larynx. 

 N Placed over the processus vocalia. 

 Median glosso-epiglottic fold. 

 P Epiglottis. 



VESSELS 



a Inferior thyroid artery. 



b A laryngeal branch of inferior thyroid. 



c Superior laryngeal. 



NERVES 



1 Eecurrent laryngeal. 



2 Branch to inferior constrictor. 



8 Branch of communication with superior 



laryngeal. 

 4 Branch to arytenoideus. 



5 Branch to arytenoideus lateralis and 



thyro-arytenoideus. 



6 Branch to arytenoideus posticus. 



7 Superior laryngeal. 



