522 



ANATOMY OF VEETEBEATES. 



and granules, ib. a. This vascular surface is covered by a delicate 

 carpet of epithelial cells, fig. 348, certain linear tracts of which, 



347 



Respiratory surface, lung of Newt, magnified, with the epithelium 



out of focus. COLXVIH, 



ib. h, b, are ciliated. The exterior of the lung is covered by 

 delicate peritoneal nonciliated scales. 



348 



■/ 



E ^ 1 



in luiii, . cci.w III. 



1 1 Unl criiig 



111 tlic Siren the lungs are narrow bags, coextensive with the 



