AND MYOLOGY OF THE MARSUPIALIA. 



871 



slightly emarginate. Its connections to the arytenoid cai^tilages 

 are also thick, and the superior aperture of the larynx is large 

 and open. The rima glottidis has very thick boundaries. In 

 tSarcophil'us harrisi, on the other hand, the epiglottis is large 

 and thin, and its posterior parts are folded inwards and lean 

 against the anterior parts, so the superior aperture of the larynx 

 is a transverse slit. And the arytenoid cartilages and rima 

 glottidis are entirely concealed. 



Text-fi2ure 77. 



Dide/phys 

 marsupia/is. 



P/}3/a/>ffer 

 Petaurus bre^i- or/enta/is. 

 caps papuanus. 



The larj'iix of the Marsupialia. The convex dotted lines crossing the epiglottis' 

 are the levels of emargination. 



The epiglottis of Peraineles ohesula has a broad, emarginated, 

 notched apex ; and there is a small fossa with a crescentic 

 orifice between the epiglottis and the tongue. The characters of 

 the fossa in P. lagotis have already been described by Owen (10). 



In the Macropodidfe there is considerable variation in the 

 characters of the epiglottis. In Dendrolagus iirsinus it is entire 

 and the sides are folded inwards, so the superior laryngea 



Prog. Zool. Soc— 1921, No. LYIII. 58 



