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selection of fry, wherein rapid incubation may cause puny off- 
spring, and anything which tends to check their early growth 
may occasion their being subsequently dwarfed. Without 
referring to any country or district in particular it does seem 
rash to turn all the young so soon as they have absorbed their 
yolk-sac into a main stream whereby all trace becomes lost, 
and the enthusiastic equally with the lazy or dishonest fish- 
culturist (who save themselves trouble by rapidity of hatching) 
show a large number of fish planted, the majority of which 
will die or be devoured by their enemies. It is, with few 
exceptions, best to retain these fish until at least a twelvemonth 
old, when those turned into the waters will be most competent 
to engage in the battle of life, and in which only some of the 
strongest will survive. 
Now came the question of what to do with the young fish 
as they were absorbing their yolk-sacs, for although they con- 
tinued pretty well fed upon pounded liver, it occupied a con- 
siderable time. I was asked by Mr Ogden to plant some in 
the stream at Cowley, below where it emerges from the two 
stockponds, so on April 16th I turned in about 2,000. Some 
likely spots had been prepared by the keeper, by throwing 
small dams across the stream in different places. However, I 
was not very sanguine of success, as in the main stream below 
a large number of bull-heads, Cottus gobio, exist, while ‘moor 
hens abound. On searching the banks frogs were found to be 
plentiful, while in the water was an excellent supply of water 
shrimps, Gammarus pulex, and water snails, Limnea ovata var. 
peregra, and the caddis worm as well as the May-fly were very 
numerous. On returning to this stream four months subse- 
quently we searched it to see if any of these Lochlevens could 
be found, but we saw none, although we took several little 
local brook trout. 
As these 2,000 had not exhausted my stock, I was asked to 
turn the rest into the Windrush, which I did. Here I found a 
very likely spot, that had been formerly used for rearing trout 
and grayling. Fed by several streams coming out of the side 
of a hill, they converged into a rather broad sheet of shallow 
