236 Proceedings of the Royal Society 
of fungoid disease. I removed other two salmon on the 19th of 
the same month from the mill-dam at Holme Head, and put them 
into the same pool for safety (they having been left nearly dry), 
making a total of seven salmon. On the following day I noticed a 
second marked on the dorsal fin. Since the last mentioned date I 
have not been able to see them distinctly, in consequence of the pool 
being frozen over with ice, until yesterday. I noticed three 
salmon affected out of the seven, and in a much worse condition — 
being all marked from head to tail ; and this morning, on again 
examining them, I found the fourth slightly affected, making now 
only three out of the seven clear of the supposed disease. — I am, 
Sir, your most obedient Servant, 
“ John Hiciiolson, Inspector. 
“To Mr Superintendent Sempill, 
“County Constabulary, Carlisle.” 
Each of the salmon mentioned in Nicholson’s report had a label 
attached to it, stating when it was free of fungus, and when first 
observed to be affected, as follows : — 
No. 1. A male kelt, 8 lbs. — “Observed slightly affected on 16th 
January.” 
No. 2. A large male, 30 lbs. — “Was free of fungus on the 16th 
January, and was seen to be slightly affected on the 20th January.” 
No. 3. A female, 14 lbs. — “Was free of fungus on 20th January, 
and was observed to be affected on the 2d February.” 
No. 4. A male kelt, 9 lbs. — “Was free of fungus on 2d February, 
and was observed to be affected with fungus on the 3d (or following 
day.” 
All those salmon were carefully examined — both anatomically 
and also microscopically. They were found to be affected with 
Sopjrolegnia ferax in various degrees of intensity over the whole 
body. The viscera and organs of generation were perfectly normal, 
and a number of valuable preparations have been added to the 
Museum which were prepared from them. 
Inspector Nicholson’s observations are very valuable, showing not 
only the sudden attack and rapid growth of the fungus upon the 
fish, but also that frost and ice have no effect in either checking or 
destroying the growth and spreading of the plant, as has been stated 
by Mr Buckland. The salmon noticed by Inspector Nicholson to 
