82 . LECTURE VIII. 



state: the result of these inquiries seemed to 

 prove a species of real internal lungs; but the 

 more accurate researches of others have since 

 proved that these supposed lungs were no other 

 than a particular kind of vesicular processes which 

 the animal has the power of occasionally inflating 

 in order to render itself specifically lighter ancl 

 to ascend at pleasure with the greater facility. 



