LARYNX OF MAMMALIA. 



597 



the back of the thyroid and the base of the epiglottis. 1 An 

 interarticular cartilage lies between the arytenoids. I found 

 both these cartilages partly ossified and the cricoid confluent 



with the upper two tracheal rings. The 

 470 laryngeal cartilages are commonly more 



or less ossified in the Slow Lemurs. 



In Stenops gracilis the lower cornua 

 of the thyroid are produced over and 



471 



Larynx of Cat. cccxx. 



Vertical section of the head and neck, with the expanded 

 basihyal and larynx, of Mycetes seniculus. lxix'. 



beyond the cricoid to be connected with the first tracheal ring : 

 the crico-thyroid interspace is narrow, but vertically wide : there 

 are both santorinian and cuneiform cartilages. The upper vocal 

 cords are rather thick and attached forward to the root of the 

 epiglottis : the lower vocal cords are narrow, short, and attached 

 to the thyroid : the ventricles are shallow, and are confluent 

 beneath the epiglottis. This rises high and has its free border 

 rounded and notched. The thyroid is prominent, with a median 

 emargination above, in Lemur Mongoz : the back of the cricoid 

 is ridged below, and above this is excavated. The arytenoids are 

 rather large and high, having the santorinian bodies connected, 

 but not confluent, with their apices. The vocal cords are well 



1 cii'. p. 44, pi. 10, fig. 3. 



