256 



COMPARATIVE ANATOMY. 

 A 



B 



Tr 



FIG. 208. LARYNGES OF VARIOUS MAMMALS. 



A, larynx of Deer, seen from the left side ; B, longitudinal section through the 

 larynx of the Fox ; C, larynx of the Howling Monkey (Mycctes ursinus), from 

 the left side ; D, larynx of Chimpanzee (Simia troglodytes), from the ventral 

 side. 



Tr, trachea ; Ctr, cartilaginous rings of the trachea ; S, mucous membrane of the 

 trachea and tongue ; Or, ventral, and Or 1 , dorsal plate of the cricoid ; Ct, Ct l , 

 thyroid cartilage ; oh, uh, anterior and posterior cornua of the latter ; Ca, ary- 

 tenoid cartilage ; pm, processus muscularis of the latter ; Ep, epiglottis ; H, 

 body of hyoid ; h, lesser, h l , greater cornua of the hyoid ; Lt, crico-thyroid 

 ligament ; Mth, thyro-hyoid ligament ; M, laryngeal pouch, which shows an 

 enlargement at t ; 1, 2, 3, the three resonance-cavities of Simia troglodytes ; mu, 

 submucous tissue with muscles ; M.ge, genioglossus muscle ; Z, tongue. 



