Notes . 
791 
become hypogeal like those of Araucaria brasiliana , A. imbricata and 
A. Bidwillii. 
A. 
Fig. 29. 
A. Portion of the upper surface of the cotyledon of Ginkgo, showing a stoma 
with distinct pore. 
B. Portion of a section across the fused cotyledons of Cycas. The two guard- 
cells of the stoma are distinctly separated and their outer walls are cuticularized. 
Cuticular thickening at other points indicates the line of junction of the two coty- 
ledons. 
GRACE WIGGLESWORTH. 
Owens College, Manchester. 
3 H 
