LARYNX OF MAMMALIA. 



595 



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

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

 duced downward, at e, 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 f belling ' (quasi 

 bellowing) : in the Fallow-deer 

 it is something between a belch 



O 



and a brav : in the Roe-buck it 



467 



is a shriller grunt. 



466 



">:- I'l'.l 1 



L;ivynx of Alci^s. ivrxx. 



Larynx, L'rsiis Malayanus. rccxx. 



In the Bear the thyroid is convex, the ahe 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. i>, almost extends thereto in Ursus 

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

 long. The cricoid is almost divided by an anterior cleft, e, 



.' 'j '2 



