104 
THE CALIFORNIAN SALMON. 
ailment was a small white spot on the umbilical sac ; after 
this appeared the fish became dull and sluggish, and ran 
round in a circle. The white speck increased in size, and 
in about a week generally proved fatal. A few survived, 
and of these, thirty healthy specimens of the salmo 
salar are still alive. They have made rapid growth, and 
are now nearly two inches in length, and very thriving and 
healthy. I shall try to keep these fish in the ponds at 
Ercildoune until they are of the age to spawn, in the hope 
that some fertile ova may be obtained from them. This 
small number could not at any rate be expected to do 
much in stocking a river, taking into account all the 
dangers to which they would be exposed, and the experi- 
ment of retaining them in fresh water, may give some very 
interesting and valuable results. 
EXPERIMENT OP M. COSTE IN KEEPING 
SALMON IN PRESH WATER. 
In a note to the Societe Imp er idle d' Acclimatation of 
Prance, dated March 4, 1859, by M. Jules Cloquet, 
the statement is made that salmon have been found to 
propagate their species in artificial ponds of fresh water. 
The details are of so much interest that I have made the 
following translation for the benefit of English readers : — 
“ I have the honour to make known to the Society a dis- 
covery which, it appears to me, is destined to exercise a 
marked influence upon the future progress of pisciculture 
in our rivers. I refer to the reproduction of salmon in 
artificial ponds securely enclosed, in which the fish, shut 
up from the time of hatching, have never been able to 
migrate to the sea. This . discovery has been made at 
Saint Lucufa, near Saint Cloud, in one of the domains of 
