122 k. T. BAKER AND H. G. SMITH. 
the bundle as to form a dark or black ring around it, (Vol. 
XLI, pl. xix to xxv). In M. trichostachys it is shown, (Vol. 
XLIV, pl. xlii, xliii), scattered throughout the spongy paren- 
chyma and no where else, whilst in M. bracteata, the 
Same paper, it is depicted in the epidermal cells and the 
centre of the spongy parenchyma, and in the same tissue 
are seen deposits of it in M. genistifolia, and where also. 
only a few indications of it are found in M. nodosa. 
Crystals of calcium oxalate are fairly plentiful, the first 
recorded in a Melaleuca leaf. Oil glands are numerous. 
and irregularly scattered throughout the leaf tissues. 
They vary in size, being larger towards the midrib where 
their diameter in some cases almost equals the width of 
the leaf. Towards and around the edge their size is much 
smaller. 
Geographical Distribution. 
The original locality is given as Lane Cove, Port Jackson, 
H. Deane, but Camfield (Proc. Linn. Soc., N.S.W., 1901), 
records it between Arnclifie and National Park. Mr. F. W. 
Williams obtained the material from which the chemical 
results were obtained at Cook’s River. It is thus seen to. 
be a rare species, and with the encroachment of the city 
will probably in the near future be exterminated. 
Chemistry of Essential Qil. 
The material for this investigation was collected at. 
Cook’s River, near Canterbury, New South Wales, in the 
monthof March. It was tothe courtesy of Mr. F.W. Williams 
that we were able to obtain it from this locality, and he 
kindly assisted the collector of the Technological Museum 
to procure the leaves for distillation. ; 
T'wo separate collections were made, one from the young 
growth, or ‘‘suckers,’’ which had sprung from the trees. 
felled about 18 months previously; the other consisting of 
mature leaves and terminal branchlets from old trees. 

