114 
pected of pathogenic qualities, it was considered advisable to 
make a more detailed investigation of its morphology and bio- 
logical relationships. 
Lire History oF THE FUNGUS IN PURE CULTURE. 
The pycnospores usually germinate in a period of from one 
to three or four hours on nutrient media at room temperature 
(approximately 14-16° C.), and a moderate mycelial growth 
occurs. At first this is pure white but with increasing age 
becomes slightly grey. The medium directly beneath the colony 
is coloured brownish-red or variously from this to a dirty grey, 
the coloration not being constant for any particular nutrient 
medium or strength of medium. : 
The superficial hyphae are 
hyaline and septate; an 
smooth and regular with the 
exception of the terminal 
Pig cell which is frequently un- 
= dulate. (Yeat Fig. 1.) 
1, Undulate terminal cells from mycelium and the transverse wa ls are 
e oi Hoa (Swift formed by the ingrowth of a 
wall substance. (PI. V. Fig. 1.) The cell nucleus contains one 
= nd ey two nucleoli, and occasional granules which stain 
Sialecinr Fat is present in the vacuoles of the cyto- 
The cell not mirequently there is distinct evidence of glycogeD. — 
© cell walls stain dull yellow with Schultze’s chlor-zinc-iodine 
solution, 
froan oy etiam, penetrates the nutrient medium to a depth of 
etion’ % © eight millimetres, and the submersed hyphae até 
y Getbey nodulose, barrel-shaped or globular 
cells. (Teat Fi g 
PN 
2. Irregular fo : : 
x IIL. eveglaen: : submersed hyphae from various media. (Swift 5 
