1 34 Walking Leaf 



ently only such marginal veinlets are free as would be if it 

 actually did so. 



Each of the lateral lobes of the leaf, if at all pronounced, 

 contains more or less of a distinct mid vein, which starts from the 

 starting-point of the basal areole next the leaf's midrib. These 

 midveins are formed by the areolae through the centre of each 

 lobe gradually straightening in such a way as to form a double 

 row of areolae, the veinlets that form the side in common of the 

 two single rows making up the double one, thickening and con- 

 stituting a midvein. 



