399 
Physiology of the Genus Eidamia . 
at both ends, and vary in size from 4^x2 /x to 7 n x 3*5 Under 
certain conditions the conidia are disposed in groups : the conidium at the 
end of a chain tilts over until it rests sideways on the one below, and this 
process continues until all the spores are arranged in a group at the tip of 
Fig. 7. E. catenulata . Swollen cells producing sterigmata; from a culture on 
N/100 HC 1 potato extract agar at 20° C. x 390. 
Fig. 8 . E. catenulata. Macrospores from a four-day culture on 
potato extract agar at 20° C. x 390. 
the sterigma (Fig. 12). This grouping, which is incidental for this species, 
is typical of E . viridescens , where chains are only occasionally seen. The 
disposition of conidia in groups may be easily overlooked when the conidia 
are mounted in liquid media, since they easily fall away from the sterigmata. 
The colour exhibited in cultures of this species is due to the innumerable 
D d 2 
