22 Transactions British Mycological Society. 
the student needs a well-equipped laboratory for his investi- 
gations. In 1g09 Professor A. H. R. Buller published his 
“Researches on Fungi,”’ which is an invaluable work embodying 
the results of original research on the physiology of our fungi 
and it is to be hoped that he will favour us with another volume 
on the same subject. 
I have now passed in brief review the most important features 
of our mycological progress that has been made since the founda- 
tion of our Society. I think that we can congratulate ourselves 
on the fact that, although many of our junior members were 
called away during the war, we managed to carry on, to hold 
our autumn forays and to publish our Transactions as usual. 
We have emerged from that trying time stronger in number 
than we ever were before and I feel confident all our members 
will continue to advance our knowledge and uphold our motto 
“Recognosce notum, ignotum inspice.”’ 
THE PARASITISM OF NECTRIA CINNA- 
BARINA (CORAL SPOT), WITH SPECIAL 
REFERENCE TO ITS ACTION ON RED 
CURRANT. 
With Plate I. 
By J. Line, M.A. 
GENERAL. 
This subject has been investigated by a number of workers, 
but although the very familiar fungus is regarded in this country 
as a frequent parasite on many broad-leaved trees, no critical 
investigation appears to have been made, nor has it been con- 
sidered as the cause of any serious damage. 
Mayr(z) demonstrated by actual infection experiments as long 
ago as 1883 that the fungus could become parasitic on maple: 
although he did not use pure cultures of the fungus there seems 
no reason to doubt the general accuracy of his results. 
He pointed out that the normal method of infection was 
through a wound, and that the fungus could not penetrate the 
living phloem and cortex. He also showed that the fungus when 
established in a side branch could readily pass over into the 
healthy wood of the main stem, and that the pathological effect 
was primarily due to the blocking of the vessels by the hyphae, 
causing death of all parts above the point affected. The stem 
so killed was then easily and rapidly invaded by the fungus, 
although the first blocking process might take two years or 
considerably more. 
