110 HARSHBERGER— COMPARATIVE LEAF STRUCTURE iAprii24, 



Illustrations. — The reproduced photographs (Figs, i and 2, 

 Plate I.) represent the dune vegetation on the south shore of 

 Bermuda. The upper illustration shows the thicket of composite 

 vegetation on the crest of the dune and the long, trailing stems of 

 Ipomcca pcs-carpa on the upper beach with a small clump of 

 Cakile (Eqiialis to the left in the foreground. The second illustra- 

 tion depicts a clump of Sccvvola Phmiieri, with the Bermuda cedar, 

 Jwiiperns hcnnudiana, and in the background the grayish-green 

 bushes of Tourncfortia gnaphalodcs. Reference is made to the 

 drawings of microscopic structure in the classified description of 

 dune plants throughout the paper. 



