18S7.] 



IN THE LARYNX OF THE ANUROUS AMPHIBIA. 



497 



Ceratophrys americana (fig. 4, p. 495) both epiglottis and epilaryngeal 

 folds were found to be well developed ; but tiiough conspicuous, they 

 remain co.nparativelj insignificant beside those of an adult male of 



Fig. 6. 



The larynx and floor of tlie mouth in Chirvlepfes audrahs, adult (S • 



The larynx in the same, seen en face. Both figs, magnified twice. 

 Eeferences as in previous figures. s.g\ orifice of gular sac. 



Chiroleptes australis, that being one of the genera possessed of the 

 well-known gular sac {s.g, s.g , figs. 6 and 9). This specimen presents 

 tlie maximum development observed, and I have accordingly figured 



