436 MISS H. BANDULSKA ON THE CUTICLES OF 
Their average length is ‘025 mm. and their average width across the pore is 
‘023 mm.; thus the stomatal measurements of Fagus orientalis are in 
complete agreement with those of Fagus sylvatica. Tubular hair-bases resting 
upon five to seven radially-grouped cells occur on venules and paren- 
chyma. 
Fagus S1eBoLpit Endl. (5796 Brit. Mus. Herb.).—The cuticle is delicate 
easily over-macerated. 
Lower Epidermis (Pl. 40. figs. 29, 30).— This bears very numerous long 
tubular hairs and hair-bases on the larger venules, the hairs resting on five to 
seven radially-disposed and thickened epidermal cells. There are no hairs 
among the epidermal cells, nor is there the network of venules forming areoles 
so characteristic of other Fagus species. The stomata are extremely delicate, 
and are surrounded by parenchyma whose walls are thin and practically 
straight. The stomata have slightly thickened cuticular rims, but their outer 
walls are very delicate and their junctions are not thickened ; hence there is no 
suggestion of the cutinized “ dagger” or * T" piece so common in Nothofagus. 
The epidermal cells are somewhat radially disposed round the guard cells. 
The average length of the guard cells is 021 mm. and their average width is 
‘021 mm. 
Upper Epidermis.—-This consists of nearly straight-walled parenchyma. 
Narrow venules, two cells wide, bearing occasional hair-bases, cross the surface 
at wide intervals. Their cells are thick-walled, elongated, and somewhat 
irregular in size and shape. 
Fagus SINENSIS Oliver (4409 Brit. Mus. Herb.). 
Lower Epidermis (Pl. 40. figs. 31, 32).—Very delicate stomata are enclosed 
by long, tubular, thick-walled unicellular hairs. The guard cells vary in size, 
and are sometimes wider than long. Their outer walls are very delicate, but 
their junctions are slightly thickened, forming a short “T” piece, and the 
poral rims are also slightly cuticularized. The average diameters of the 
stomata are ‘026 mm. by ‘027 mm. 
The parenchyma is regular, moderately thick-walled and straight, though 
occasionally a wall shows one sinus. This is strikingly different from the 
parenchyma of the upper surface, which is markedly sinnate. The venules 
are 2-9 cells wide, elongated, and very thick-walled, some cells showing 
spiral thickenings. They are not seen in well-macerated material. Hairs 
occur among the stomata and scattered through the parenchyma as well as 
on the venules. The hairs arise from a base of about seven radially-grouped 
cells, and when the hair is torn away these surround a circular space. 
Upper Epidermis (P1. 40. fig. 33).—The parenchyma is regular and very 
sinuate, and crossed by widely-separated venules, two cells in width. 
