-MANORANJAN MITRA 63 
glucose agar, but less luxuriant. Conidia numerous, sometimes 
on the sides of the conidiophores, 22°5—30y > 12°5—16:2y in 
diameter. Chlamydospores are also formed. 
3. Wheat broth agar. Growth profuse, nearly as good as No. 1. The 
medium in the beginning is slightly pink in colour along the 
margin, but the main portion is grey. After a few days, the 
marginal pinkish colour turns slightly yellow and the main portion 
darkens. Aerial mycelium is produced in a sufficiently large 
amount and almost fills the tube. Hyphe subhyaline to greyish 
brown and up to 7p in diameter. Spore formation copious and 
begins when the culture is only two days old. Conidia 2—5 at the 
tip of conidiophore, but often only one and occasionally up to 8 are 
noticed. Secondary sets of conidia are also frequently formed. 
They measure 25—35y x 12°5—15p. i 
4, Wheat meal agar (+2 Fuller’s scale). The growth of the fungus is 
crowded or compact. First the medium gets pink towards the 
margin, then gradually changes into light greenish grey. This 
colour predominates for some time in the whole medium and 
then, as the culture ages, it changes into dark yellow. Hyphe 
subhyaline to dark grey and up to 75» in diameter. Spore 
formation fair and conidia 25—32‘5p x 12°5—15, in diameter. 
5. French-bean agar (+8 Fuller’s scale). A good growth with abundant 
aerial mycelium almost filling the tube within 7 or 8days. The 
medium is first grey, then dark in colour. Hyphe remain either 
sterile or very few spores are formed, but there is a great develop- 
ment of chlamydospores. The conidia are 275 long and 15p 
broad. 
6. Nutrient glucose agar (+5 Fuller’s scale). Copious woolly aerial 
growth. Aerial hyphe greyish brown in colour. The medium in 
the beginning becomes light pink and this'later on turns into dark 
brown. Aerial hyphe after some days change into olive brown. 
Spore formation begins when the culture is 3 or 4 days old and 
conidia are formed in large numbers. They measure 25—37 Spx 
125—20yu. Besides this formation of spores, chlamydospores of 
a dirty brown colour are produced in fairly large numbers. 
7. Rice meal agar (--4 Fuller’s scale). The growth is fair and slightly 
pink in colour as in the last medium. With age, the hyphe 
become darker in colour. The margin of the medium changes to 
pinkish yellow. Spore formation poor. The conidia measure 
22:5—37 5p xX 10—16 2s. 
