373 
Marshall Ward. — On a lily -disease. 
Taking the register for July, we find 448 of cloud (out of a 
possible 620) in 1886, and blue sky was seen on twenty-eight 
of the thirty-one days. 
In 1887 = 375 of cloud, and blue sky was seen on thirty 
days out of the possible thirty-one. 
In 1888 the cloud amounts to 557, and only eighteen days 
are recorded as showing any blue sky. 
If we then look at August. In 1886, the total cloud 
registered = 41 3 out of 620, and blue sky was visible on twenty- 
nine of the thirty-one days. 
In 1887 the cloud = 399, and blue sky was seen on twenty- 
eight days. 
In 1888 the cloud = 499, and twenty-five days out of the 
thirty-one showed some blue sky. 
Of course these are rough estimates, but so far as they go 
they entirely support the impression I had formed inde- 
pendently — viz. that the summer of 1888 has been dull, wet 
and cold, compared with 1887 especially. 
SUMMARY. 
In the foregoing memoir, I have attempted to bring out 
the whole life-history of the fungus causing the disease 
described, so far as it occurs on the living and dying lilies. 
Commencing with the description of the external symptoms, 
disease-spots, etc., I then show that the fungus always found 
in their tissues is a Botrytis (of the form now called Polyactis). 
The spores, cultivated in suitable media, give rise, after ger- 
minating in a characteristic manner, to a copiously branched 
and septate mycelium, with well-marked and easily-recognised 
morphological features, and which presents some physiological 
phenomena of much interest and importance. 
Some of its branches form cross-connections by a process 
so like conjugation, that it is difficult to avoid applying that 
term to it ; their conjugation is preceded by an attraction for one 
another, which is shown by mutual deflections of the growing 
