266 MISS H. BANDULSKA ON THE CUTICULAR STRUCTURE OF 
for the use of the Department and the access to the unique supply of fossil 
material in the Gardner Collection. 
The authorities at Kew supplied both fresh and herbarium material for 
comparison, and I am very grateful to Sir David Prain and to Dr. O. Stapf 
for their help and kind suggestions. 
I have to thank Mr. A. J. Maslen for much general help, and for the loan 
of maps and literature. 
I have also been very fortunate in obtaining the valuable assistance of 
Mr. F. W. Edwards, whose photographs of my preparations aid much in 
making the text clear, and I tender him my hearty thanks, 
I have to acknowledge with much gratitude a grant from the Royal 
Society in aid of the preparation of this paper. 
(Thesis approved for the Degree of Master of Science, London University.) 
EXPLANATION OF THE PLATES. 
Except where otherwise stated, the figured specimens are the property of the writer. 
PLATE 20. 
Fig. 1. Dicotylophyllum Stopesii, sp. n., natural size. 
Fig. 2. Cuticle of under epidermis x 90. Vein shown bearing hair bases. Hair bases are 
also seen among the stomata. Hair bases show cells with strongly thickened 
radial walls. 
Fig. 3. Cuticle of under epidermis x 540. Large guard cells with very thick cuticular 
rims, and open pores. Stomata surrounded by 4 or 5 definitely grouped accessory 
epidermal cells. 
Fig. 4. Cuticle of upper epidermis x 90. Parenchyma with hair bases and very few 
stomata. 
Dicotylophyllum spiculatum, sp. n. 
Fig. 5. Under epidermis x 90. Stomata with open pores. Some apertures on the left of 
the field appear cruciform. V.15863 a. 
Fig. 6. Cuticle of under epidermis x 250. Spicular ridges in accessory cells and epidermal 
cells. Asymmetry and irregularity in size of epidermal cells, and relatively 
greater width than length of accessory cells. 
Fig. 7a. Cuticle of under epidermis x 540.  Thick-walled epidermal cells and branched 
spicules in four groups in accessory cells. 
Fig. 76. Cuticle of under epidermis x 540. One stoma with accessory cells showing two 
groups of bifurcating spicules. 
Fig. 8. Cuticle of under epidermis x 20, Showing venation and angular silhouettes formed 
by stomatal cells which appear black, while the parenchyma appears light grey. 
Fig. 9. Cuticle of upper epidermis x 90. Thick-walled parenchyma without stomata. 
-A 
