378 
Proceedings of the Royal Society 
clear fall of between 3 and 4 feet between tbe moat and the stews, 
but one of about 5 feet between tbe stews and tbe upper pond, thus 
presenting obstacles sucb as tbe fish living in these waters could 
not surmount. 
In conclusion, I feel convinced tbat tbe so-called salmon disease 
is the fungus itself, and tbat no structural disturbance in tbe fisb is 
necessary to cause fungus attack ; tbat tbis appears to me to bave 
been abundantly proved by tbe sixty specimens wbicb I bave dis- 
sected and examined ; tbat it is useless to look for more information 
on tbe origin and cause of fungus epidemic, from the carcases of 
salmon or other fisb affected with tbe fungus ; tbat the origin and 
cure or prevention of tbe plague must be sought for in tbe life history 
of tbe plant, wbicb is more tbe work of tbe botanist than the anato- 
mist. 
