J. F. DASTUR Tt 
with the mycelium as in the vascular wilts, and this explains why a healthy 
leaf or pod is sometimes found attached to a stem completely ringed by the 
white diseased bark. 
(b) The fruit. In the walls of the fruit the fungus overruns the soft 
tissues, destroying the cells. In the early stage of attack the cells are filled 
with a brown or yellow gummy substance which is not found at a later stage ; 
the fungus also acts on the chromoplasts. The different colours of the diseased 
parts of the fruit are due to the quantity of the gummy substance present in the 
infected cells and to the extent to which the chromoplasts are altered. In the 
cells, a layer or two below the epidermis, the hyphae commence to aggregate 
together, forming a loose mass of pseudo-parenchymatous cells, sub-hyaline 
or slightly brownish in colour. In the epidermal cells themselves a compact 
dark brown stroma of pseudo-parenchyma is laid down. Under the pressure of 
the growth of this stroma the cuticle is ruptured and lifted off the epidermal 
cells. The cuticle is not simply pushed up and ruptured by the fungus but is 
also partially eaten away (Plate I, fig. 9). On the surface of the brown stroma, 
now exposed to the air, a further development of lighter coloured fungus 
tissue, compo ed of elongated and narrow cells in almost parallel rows, occurs. 
The stroma of the acervulu is thus partly below the epidermis and partly 
above it (Plate I, fig. 4). The surface cells of the stroma become basidia 
(Plate I, fig. 6). The latter are hyaline, long and narrow. The conidia are 
hyaline, falcate, with an oil globuleinthe centre (Plate I. figs. 5—7). . Sete 
also arise from the pseudo-parenchymatous cells towards the surface of the 
stroma. They are abundant, simple, stiff, erect, septate and dark brown 
(fuliginous) in colour except at the tip which is lightly coloured. They 
occasionally hear conidia which are similar to those borne on the basidia 
(Plate I, fig. 5). 
On the inside of the skin acervuli are not formed, but there are instead 
small round black or dark brown raised solid bodies composed of pseudo- 
parenchymatous cells formed by the conglomeration of hyphw. These 
sclerotia-like bodies are also found on the thalamus. 
(c) The seed. The inner walls of the normal cells of the seed coat are 
enormously thickened and finely striated. The outer wallis also thickened 
but very little in comparison with the other walls. This outer wall is com- 
posed, of cellulose, while the inside walls contain both cellulose and lignin.* 
* When treated with an acid solution of phloroglucin the inner walls of the seed coat 
show distinctly two layers. The centre of the thickened walls takes a red colour which 
shows the presence of lignin, whilethe rest of the thickened walls becomes light vellow 
in colour ; but with Schulze’s solution these parts stain blue, being composed of cellulose. 
and the centre stains yellow. 
