395 
Physiology of the Genus Ei cl ami a. 
The aspergilliform head of conidia is typical for this fungus, but on 
potato extract agar every stage between this form and sterigmata borne 
singly on a lateral hypha occurred (Fig. 3). This variation was noted by 
Bainier ( 1 ) in his description of Papulaspora aspergilliformis , and by Eidam 
(6) in his description of Helicosporangium parasiticum , the figures of which 
markedly resemble those found by the writers in Eidamia acremonioides on 
potato extract agar. 
The peculiar growths (bulbils) figured by Rabenhorst for E. acremoni¬ 
oides were not observed in the culture media employed in this investigation. 
Growth was obtained on potato extract agar, potato mush agar, potato 
glucose agar, rice, in a 2 per cent, solution of peptone (where many irregular 
Fig. 2 . E. acremonioides. Conidio- 
phores showing chains and groups of 
conidia. x 390 . 
Fig. 3. E. acremonioides. Types of 
conidiophores produced when grown on potato 
extract agar at 20° C. for four days, x 390. 
short branches occurred on the mycelium, probably representing incipient 
conidiophores, and the majority of the macrospores were hyaline), and 2 per 
cent, peptone containing a 4 per cent, concentration of glucose. Slight 
growth also was visible in solutions of sucrose and maltose and a synthetic 
nutrient agar. With potato extract agar and certain percentages of citric 
acid the growth was tufted and exhibited considerable sporulation with 
macrospores at the higher concentrations; whilst on neutralized potato 
extract a thick scum-like growth was produced, dotted with brown macro¬ 
spores and conidia in chains and groups. 
The colour of the growth produced in various media varied with the 
age of the culture and temperature conditions. At 20° C. the initial colour 
was light brown, changing to snuff-brown and finally Vandyke brown, 
whereas at 25 0 C. the initial colour was, as a rule, pinkish buff or pinkish 
cinnamon ; and where growth occurred at 30° C. the colour was usually 
ochraceous salmon. 
