Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
CERTAIN DICOTYLEDONOUS AND CONIFEROUS LEAVES. 267 
Dicotylophyllum sinuatum, sp. n. 
ig. 10. Complete leaf, V.14917, British Museum (Nat. Hist.) Geol. Dept. 
. 11. Under epidermis x 200. Stomata grouped into areas by veins. Sinuate epidermal 
parenchyma. Thick-walled raised papillate hair bases on veins and scattered 
among epidermal cells. V. 15862 a. 
. 12a. Under epidermis x 540. Showing difference in size of pairs of guard cells and of 
pores. Thickened junction of guard cells isclear. A narrow granular subsidiary 
cell forms a border round each guard cell. V. 15862 a. 
. 126, Under epidermis x 540, Showing collar-like hair base. 
Araucarites Gopperti. 
13. Cuticle x 135. Part of a stomatal band, in which stomatal axes exhibit great 
variability in orientation. Pores are surrounded by 4 or 5 accessory epidermal 
cells. V. 488 a. 
14. Cuticle x 380. Guard cells within the poral ring of accessory cells. Thick-walled 
epidermal cells, horizontally elongated, occur between two adjacent stomata in 
one linear series. V. 488 a. 
Araucaria Cunningham. 
15, Cuticle x 135. Band of closely-packed stomata whose axes vary in direction, and 
thick-walled sinuate oblong epidermal cells. 
16. Cuticle x 380. Two stomata with accessory cells. Thick-walled pitted epidermal 
parenchyma surrounds the poral rings. 
Araucaria excelsa. 
17. Cuticle x 185. Part of stomatal band showing asymmetric poral axes, and 
rather irregular stomatal lines. Narrow, vertically elongated, straight-edged 
epidermal cells between the stomatal series, 
18. Cuticle x 380. Two epidermal pits surrounded by 4 (or 5 in one case) accessory 
cells, and with guard cells below the surface. Stomatal pore between the guard 
cells is seen as a narrow slit. 
Araucaria Bidwilli. 
19. Cuticle of under epidermis x 380. Stomatal pit surrounded by 5 accessory cells, 
which disturb the symmetry of the vertical rows of epidermal cells. 
PLATE 21. 
Araucaria Bidwilkt. 
20. Cuticle of under epidermis x 135. Vertically orientated stomata in linear rows. 
Vertically elongated epidermal cells. 
Araucaria imbricata. 
21. Cuticle x 135. Thick-walled epidermal cells. Linear series of stomatal pits, 
whose axes vary in orientation. 
22. Cuticle x 380. Four stomatal pores, one pore shows slightly open guard cells. 
