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THE AUSTRALIAN NATURALIST. 109 
running wp to 75,000 to the square inch, and each one 
crowned with an unicellular hair, which does not occur 
on those of the branches. These hairs have apparently 
no orifice for the ingress and egress of gases. Probably 
this strange circumstance is sufficient to account for the 
early shedding of the leaves, and their deformity. The 
guard cells of both classes of stomata are irregularly 
oriented. 
Exocarpus aphylla RBr.: This is a sister plant to 
the “Wild Cherry.” The internodes are very short in 
this shrub, and the stomata are inserted within the very 
narrow grooves which run longitudinally, and these 
grooves are protected by crowded hairs from the changes 
of weather and from too rapid a transpiration through 
the stomata. The stomata are difficult to locate, being 
concealed amongst the dense hairs. 
Templetonia egena, Benth: The epidermis of the 
branches of this shrub is comprised of bands, one half 
millimetre broad, eachalternate one bearing stomata. 
The guard cells are elliptical in shape when closed, and 
circular when opened; they lie irregularly oriented. 
Frequently the stomata are in pairs, and they number 
58,750 to the square inch. [Zach stoma is surrounded by 
a circlet of wedge-shaped subsidiary cells, and appears: 
to have a slitted membrane opening along the meridian. 
Casuarina, sp.: Not having obtained the fruits of 
this species I am unable to identify it, but I presuine 
there would be little difference as to the morphology of 
the stomata. The internodes are comprised of bands of 
various widths alternating with grooves, which in cross 
section appear of the shape of indian clubs; they mea- 
sure 0.25 deep and 0.06 mm. wide. The stomata are 
placed along the sides of the grooves, which, as in othev 
cases, are clogged with short, thick hairs, and are orient- 
ed at right angles to the grooves. The guard cells are 
elliptical, and intruded at each end with minute wedge- 
like processes, thus reducing the stomata to very minute 
oblong openings 0.01 x 0.05 mm. which run in series of 
twos. 
Sarcostemma australe, RBr.: “Caustic Vine.’ In 
this trailer the guard cells are oriented longitudinally 
with the stems, are well spaced, and very large, being 
