248 MISS H. BANDULSKA ON THE CUTICULAR STRUCTURE OF 
occurs between the two guard cells. Some of the guard cells, but not all, 
are widest at right angles to their length. 
Average width of guard cells across the pore ‘022 mm. 
Average width of guard cells parallel to pore ‘026 mm. 
A very narrow, deeply staining subsidiary ceil with granular contents 
forms a border round the outer edge of each guard cell, and while the latter 
become yellowish with saffranin, the former stain very deeply pink. The 
average width of the subsidiary cells is ‘004 mm. 
Veins: These consist also of cells with sinuate walls, but they are elongate, 
narrow, and less deeply sinuate than the ordinary epidermis. They are 
about 7 cells wide. Average length of a cell ‘03 mm., average width 
‘009 mm. Hairs or papille bases: These are like raised spiked collars and 
of very definite appearance, resembling in shape the spiked collars which 
formed mediæval instruments of torture. These hair bases are very thick- 
walled with six or more radiating, sometimes bifurcate spikes of thickening, 
which gradually thin out peripherally and become continuous with the 
walls of adjacent cells. The * collar " itself would seem to be a single cell 
with a very thick and spiky wall and raised above the level of the cells 
around, 
Upper Epidermis consists of epidermal cells with sinuate walls, and more 
approximately rectangular than those of the lower epidermis. Veins of 
similar cells but narrower and longer occur also. 
ARAUCARITES GóPPERTI (Sternberg) Gardner. (Pl. 20. figs. 13, 14.) 
This was first found in the form of separate curved polished brown and black 
isolated teeth and minute twig fragments, when clay lumps of material from 
the West Clitf and from Durley Chine were washed in the search for leaves, 
etc. Comparison with figures of cuticular preparations by R. Florin (1919) 
suggested a strong resemblance to Sequoia, with which leaf the tooth-like 
appearance was in agreement. Specimens in the Gardner Collection were 
also examined, and their cuticular structure was found to be identical. A 
specimen figured in Gardner’s ‘Eocene Flora’ as Araucarites Güpperti (vol. ii. 
p. 104, pl. 12. fig. 1) was also compared, and chemical treatment of its 
cuticle revealed its identical nature. 
External characters of a Leaflet.—Bach leaflet is 6-10 mm. long, strongly 
curved or sickle-shaped, quadrangular in cross section, and decurrent with 
the stem at the base where the leaf is 2 mm. wide, tapering to 1 mm. and less 
towards the acute apex. These leaflets are spirally arranged. 
Cuticular Structure—The stomata occur in two bands parallel to the long 
axis of the leaf; widen out and are more irregular towards the base. Each 
band consists of two or three long rows of stomata irregularly grouped into 
