42 THE LARYNX AND TRACHEA, BY E. VERSON. 



corniculata of the same side, divaricate in these folds, and, 

 adhering to their external surface, partly terminate there, and 

 partly extend to the lateral border of the epiglottis, becoming 

 inserted into the perichondrium. The transversely striated 

 muscular fibres, that have a breadth of about O03 0'05 of a 

 millimeter, terminate by the sarcolemma becoming attenuated 

 to a thread, which, either with or without nuclear dilatations, is 

 lost in the surrounding connective tissue, or between the fibres 

 of the perichondrium. 



The fasciculi of connective tissue of the submucous layer in 

 the vicinity of the cartilages of Wrisberg become irregular, 

 decussate and interweave with the processes of the perichon- 

 drium investing these cartilages, and form numerous spaces 

 for the reception of the acinous glands, that are here so re- 

 markably numerous as to cause the mucous membrane itself 

 to project. 



In the Sheep, Pig, Cat, and some other animals, lymph follicles are 

 contained in the mucous membrane forming the fold at the orifice of 

 the larynx. 



Lower down the mucous membrane forms the fold of the 

 upper or false vocal cords, the rounded borders of which hang 

 loosely down, and beyond these is continued as the lining of 

 the ventriculus Morgagni. At the fold of the upper vocal 

 cord a portion of the highly elastic layer (fibrous layer), the 

 direction of the fibres of which is here exclusively longitudinal, 

 extends into the highly corpusculated mucous membrane ; so 

 that this layer is also, to a certain extent, folded. Other elastic 

 fibres, running horizontally, and arising from the angle of the 

 thyroid cartilage, and passing backwards, are interwoven in large 

 numbers with the membrane at this point, partly terminating 

 in the median raphe, partly curving downwards to cover the 

 posterior angle of the ventricle of Morgagni. It cannot, how- 

 ever, be said that there is a proper superior thyro-arytsenoid 

 ligament, for the fibres do not pursue one direction exclusively, 

 nor are they united into a ligamentous band ; and a section 

 made at right angles to the superior vocal cord exhibits only 

 irregular fasciculi of elastic, mingled with connective-tissue 

 fibres, which sometimes separate from, and sometimes coalesce 



