AIR-BLADDER 



FIG. 347. 



Chatoessun. (After Hyrtl, 

 from Gegeiibaur.) Oesophagus, 

 a ; stomach, l> ; and intestine, 

 c ; with pyloric appendages, 

 up and ap'. 



FIG. 349. 



Air-bladder of Otolithus sp. 

 (After Giinther.) 



FIG. 348. 

 Air-bladder of Pogonias chromis, L. (After Giinther.) 



