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NINTH ANNUAL MEETING. 31 
Often the next year shows already an increase in the catch 
of the summer-salmon. 
SALMO QUINNAT IN HOLLAND. 
The California salmon-eges, which, through the kindness of 
Prof. Spencer F. Baird, were presented by the United States of 
North America to the Netherlands, arrived per the Rotterdam 
steamer Schiedam, on three of Mr. Frederick Mather’s improved 
refriger-ating boxes, on November 7th, at Brouwershaven. 
During the passage, which lasted seventeen days, they were 
kept in the ice-house, and cared for by the chief officer. 
Next day I met the steamer at Hellevoetsluis, transported 
the eggs to the zoological gardens at Amsterdam, and had them. 
a little after midnight on the trays in splendid condition. Al- 
though not a single egg was picked out on the passage, the 
loss in bad eggs was only about two per cent. 
During the hatching process the loss was far less than last 
year, and amounted to about fifteen per cent. 
December 21st the last egg was burst. The fry are doing ex- 
ceedingly well, and there are very few of those Siamese-twins 
and crooked-backs among them. The loss in fry was in the first 
days, about forty per day, gradually diminishing, and is now at 
the highest eight per day, a very low figure compared with that 
of 1878, when it ran as high as twelve and fourteen hundred in 
the first days. 
I expect that when the sac is absorbed the loss in fry will be 
less than one per cent. 
Of last year’s lot 5,000 fry were put in a small pond and left 
to themselves, only taking care there was no lack of water. 
They were put in in January, 1879, when the sac was very near 
gone. All the food they got were the water insects from the 
brook by which the pond was supplied, and a few crushed mus- 
sels (myttlus edulis linne). which were taken greedily, In the sum- 
mer the wire-grating’ was carried away at the outlet and a good 
many escaped. In November last the pond was drained, and 
what was left consisted of about 1,478 nice pairs of different sizes, 
the largest measuring sixteen centimeters. 
One peculiarity of the young of salmon guénnat, observed in 
