4 i 6 Petch. — Mocharas and the Genus Haematomyces. 
Alcohol, ether, and chloroform have no action on either fresh or old 
material. 
In to per cent, caustic potash, the slime swells up and dissolves. In 
small quantity, on a slide, the material turns red-brown, but when immersed 
in bulk it becomes purple. The slime dissolves, and the liquid becomes 
a deep wine colour. Alcohol discharges the colour, and causes a cloudiness 
which, however, disappears on standing. If the liquid is neutralized with 
hydrochloric acid, the colour changes to yellow, and no cloudiness occurs 
when alcohol is added. 
With chlor-zinc-iodide, both the slime and the cell-walls stain yellow- 
brown. Occasionally a small patch of the slime stains violet. After 
forty-eight hours in io per cent, caustic potash, the cell-walls stain violet, 
and the starch grains purple-brown to reddish-brown. 
Neither the slime nor the cell-walls dissolve in copper-oxide- 
ammonia. 
In strong chromic acid both the slime and the cells dissolve, with 
evolution of gas from the former. With fresh material, the cell walls are 
dissolved in about two hours, but after being soaked in water for forty-eight 
hours they dissolve in a few minutes. 
There is no effervescence with hydrochloric acid, sulphuric acid, or 
acetic acid. Dilute hydrochloric acid induces a granular deposit in the 
cells which renders them opaque. No calcium crystals are formed with 
either hydrochloric or sulphuric acid, or with ammonium oxalate after 
heating with 2 per cent, hydrochloric acid. 
With methylene blue, both the slime and the cells stain blue, not 
violet. Acetic acid does not destroy the colour. Alcohol discharges the 
colour very slowly : after an immersion of twenty-four hours in 80 per cent, 
alcohol, the cell-walls have lost all colour, but the slime remains green. 
Immersion for the same length of time in glycerine leaves both the slime 
and the cells pale blue. 
Ruthenium red stains the cell-walls red, but does not stain the slime. 
Alcoholic alkannin does not stain the slime or the cells after an 
immersion of eighteen hours. 
With Sudan III in glycerine, numerous granules in the slime stain red, 
but the cell-walls and the general mass of the slime remain uncoloured. 
Immersion for twenty-four hours in dilute alcoholic Sudan III, transferring 
to glycerine, and heating, as recommended by Kiister, only stains the 
granules as before. 
No coloration is produced by phloroglucin. 
Aniline blue stains the slime blue or greenish blue ; eosin stains 
it red. 
The coloration of the cell-walls in chlor-zinc-iodide, before and after 
treatment with caustic potash, and their insolubility in copper-oxide- 
