254 



COMPARATIVE ANATOMY. 



to the arytenoids, and the latter to the cricoid cartilage of 

 higher Vertebrates. These are all firmly united to one another by 



FIG. 200. CARTILAGINOUS SKELETON OF THE LARYNOO-TRACHEAL CHAMBER OF 

 Ranaesculenta. (A, from above ; P>, from the side.) 



Ca, Ca, arytenoid cartilage ; (7.7. 1 to C.I. 4 , cricoid cartilage ; Sp, process of tLe 

 latter ; P, plate-like broadening out of the ventral part of the cricoid ; SP, 

 glottis ; ***, three tooth-like prominences of the aryteuoid.s. 



connective-tissue, the vocal cords being situated on the inner surfaces 

 of the arytenoids. 



Reptiles. The larynx of Reptiles is supported by cartilaginous 

 elements comparable to those of Anura, there being two sets of 



J) 



Fi<:. 207. LARYNX OF Phyllodactylus europceus. (A, skeleton, and 15, musculature 



of larynx.) 



Ar, arytenoids; Cc, cricoid; S, anterior median process of cricoid ; S\ sphincter; 

 D, dilator ; T, trachea ; Of,, basi-hyal. 



cartilages, a paired arytenoid, and a ring-shaped cricoid (Fig. 

 207, Ar, Cc). 



