401 
Physiology of the Genus Eidamia. 
following sequence of colour changes was observed : pale cream, straw 
yellow, tawny olive to sayal brown ; at 25 0 C. on the same medium the 
sequence was straw yellow, old gold, and sayal brown specked with pinkish 
buff; while at 30° C. the colours ranged from cream buff to honey yellow, 
and finally to avellaneous. Other colours produced on different media are 
Naples yellow, chamois, Isabella colour, russet, and cinnamon brown. The 
darker colours are those produced after about fourteen days’ growth, and 
they do not show so much variation as in the case of E. viridescens. 
The optimum temperature for growth proved to be 30° C., moderate 
growth occurred at 25 0 C., and least at 20° C. Growth took place to 
a greater or less extent on all the culture media employed except cellulose. 
On synthetic nutrient agar some variation occurred in the mycelium, where 
very irregular cells and small branches arose in clusters (Fig. 13) suggesting 
remotely the bulbils figured for E. acremonioides . 
Bramley’s seedling apples inoculated with E. catenulata after eight 
days at 20° C. showed a surface growth of mycelium and conidiophores at 
the place of inoculation, but no parasitism of the living cell occurred. 
Growth on seasoned pine, chestnut, beech, and oak was prolific, and 
penetration soon took place (in the case of E. viridescens no growth 
occurred). 
III. Physiological Characters. 
A. Growth in Carbohydrate , Protein , and A spar agin. 
1. Sugars. 
Growth was studied in 4 per cent, solutions of sugars (flask cultures), 
sugar solutions with agar added (plate cultures), and nutrient agar con¬ 
taining sugar. 
