406 Horne and Williamson. —The Morphology and 
was obtained. In E. catenulata (potato extract agar with a 0*25 per cent, con¬ 
centration of malic acid) after six days at 20° C. the colony, after irrigation, 
was surrounded by a narrow clear zone with a purplish-pink border where it 
abutted on the starch-containing agar: the altered zone having a width of 
from 2 to 3 mm. The agar below the colony was uncoloured. A certain amount 
of variation occurred in plates containing other concentrations of malic acid : 
thus with a 1 per cent, concentration the purplish band coincided with the 
margin of the colony. Very similar results were obtained with E. vim- 
dcscens . 
Owing to the very poor growth of E. acremonioides obtained in the 
plate cultures, the failure to obtain a definite reaction by iodine irrigation 
could not be ascribed to the inability of the species to hydrolyse starch. 
Hence it was necessary to employ other methods. Solutions containing 
1 per cent, peptone and o*i per cent, starch made up in flasks were inocu¬ 
lated with the three fungi and kept at 20° C. for five and a half days. Each 
fungus having produced a moderate amount of growth in this period, the 
peptone-starch solutions were tested with a weak iodine solution. With 
a given amount of iodine added to a fixed quantity of peptone-starch, the 
control (uninoculated solution) was deeply coloured ; the solution contain¬ 
ing E. acremonioides exhibited the same intensity of coloration as the 
control; the solution with E. catemdata was slightly coloured, whilst that 
containing E. viridescens was uncoloured. Again, E. acremonioides did not 
show any indication of action upon starch. A difference in the amount of 
hydrolysis, induced through the growth activities of E. catemdata and 
E. viridescens respectively, was apparent. 
A further experiment was 7 made using 1 per cent, wheaten starch made 
up with distilled water. The flasks were kept at 20° C. and tested after 
three weeks. At the end of this period E. acremonioides had made 
practically no growth. The solutions containing the remaining species were 
tested with standard iodine solution as before. In E. viridescens hydrolysis 
was nearly complete: the liquid was of a greenish colour and a pronounced 
smell of coco-nut oil was evident. In E. catemdata hydrolysis was incom¬ 
plete. No acid was produced in either case. 
Since E. viridescens is a more rapidly growing fungus than E. catenulata , 
its greater hydrolysing activity, under the conditions obtaining in these 
experiments, is not surprising. 
3. Soluble Pectin. 
The ability of the species of Eidamia to grow in soluble pectin ex¬ 
tracted from apples was tested in connexion with a series of experiments, 
relating to fungal growth in pectin, carried out by the first-named author in 
collaboration with Miss M. H. Carre ( 2 ). Since these experiments will be 
