LARYNX OF MAMMALIA. 



.595 



crico-thyroid ligament, d, crossing the wide space of that name, 

 to the thyroid ; the cricoid is expanded behind and thence pro- 

 duced downward, at c, so as to cross the five first tracheal rings. 

 The upper cord is not defined : the lower one is inserted into the 

 middle of the fore-part of the thyroid. In the Rein-deer a 

 laryngeal sac protrudes below the base of the epiglottis. 



The Giraffe is mute, save at the sexual season. The larynx of 

 the Deer, with the annexed vascular thyroid bodies, undergoes a 

 periodical development, at the season of the rut, in the male, 

 which then utters notes characteristic of the species : in the Red- 

 deer it is termed ' belling ' (quasi 

 bellowing) : in the Fallow-deer 

 it is something between a belch 

 and a bray : in the Roe-buck it 

 is a shriller grunt. 



466 



467 



Larynx of Aires, cecxx 



Larynx, Ursus Malayatms. cccxx. 



In the Bear the thyroid is convex, the alae meet at an obtuse 

 angle, and unite along the upper half of their fore part, which 

 developes a tubercle, fig. 467, «, to which the epiglottis is at- 

 tached : the inferior cleft, ib. b, almost extends thereto in Ursus 

 arctos : the upper cornua are short, the lower ones, ib, g, are very 

 The cricoid is almost divided by an anterior cleft, e } 



Q. Q 2 



long. 



