1 



-I 



Stinly uiidiT lii.iili power. The colls of the u])j)('r 

 layer (free Ixirtler) are large Hat scales with a smooth free 

 edge. The lower liordcr i< often slightly pitted, these 

 depressions receiving the cells of the next Iowcm- layer. 

 These large cells have one or two nuclei. 'I'he cells of the 

 second layer are pear-shaped or irregularly eoliininar. The 

 cells of the deeper layer are triangular or spindle-shapi'il, 

 and til in Ix'tween the cells of the second layer. Sketch a 

 portion of the ej)ithe]iuni. 



DKAWlNti.S i-()U LKS.^^ON IV. 



