32 
The first fertilised eggs from the flounders stored in 
our tanks were obtained on March 8th. These fish con- 
tinued to supply eggs until the middle of May, and from 
these nearly twelve millions of fry were eventually set 
free. The total number of living eggs placed in the boxes 
was 16,000,000, and the number of fry set free 14,144,400, 
so that the loss during incubation was only a little over 
11°5 per cent., a very low percentage. The duration of 
incubation was 16 to 17 days for the plaice, cod, and 
haddock, and 7 to 9 days for the flounder. 
The success of the incubation was probably due to the 
healthy condition of the eggs dealt with, and also to the 
employment of apparatus giving a rocking motion to the 
hatehing boxes (see below, p. 33). 
The following list gives the number of fry set free, 
and the dates on which they were liberated. Those 
marked with an asterisk were hatched from eggs collected 
by the steamer. All were placed in some part of that 
wide area of our sea known as Morecambe Bay. 
March 21. 1,126,000 flounder. 
31. 848,000 45 
99 
Aprils «2: 598,000 <i 
” 2: 20,000 haddock.* 
Ay dD. 520,000 flounder. 
6 5. 15,500 plaice.* 
5. 23,000 § ox; 
sg 9: 934,400 _,, 
fs 9. 90a;000), 15 oF 
A: 12. 8503200 4 4 
i iz: 219,800 cod.* 
. ite. 285,700 haddock.* 
“ 1 87,500 plaice.* 
se Vee 128,600 flounder. 
. 20. 1,896,000 7 
