158 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY 



3ril 



20. 



42,000 



plaice. 



33 



20. 



43,000 



* 



33 



33 



23. 



718,000 



cod.* 



33 



23. 



462,000 haddock.* 



33 



23. 



581,000 



flounder. 



33 



26. 



861,000 



„ 



-ay 



1. 



865,000 



33 



3 3 



t . 



1,447,000 



33 



33 



10. 



530,400 



33 



33 



14. 



368,000 



33 



53 



22. 



111,000 



33 



Total 14,144,400 



During the autumn the hatching apparatus has been 

 thoroughly overhauled, and is now ready for use again. 



A fresh stock of flounders (amounting to over 225 large 

 healthy fish) has been collected during the last three 

 months of 1900, so that part of the supply of eggs for 

 the season 1901 is practically secured. With the help of 

 the new steamer, and favourable weather, it is probable 

 that there will be a larger number of fry set free this 

 year than has yet been possible. 



Description of an Apparatus for keeping Eggs in motion. 

 (See Plate A.) 



To successfully incubate large numbers of floating eggs 

 in the limited areas of the usual hatching tanks the water 

 must be kept in constant movement. When the eggs 

 are not disturbed they gravitate towards each other, 

 forming a layer on the surface of the water. Conse- 

 quently the result is a high mortality, chiefly due to 

 suffocation. It becomes necessary, therefore, to employ 

 some means to break up these masses. This is usually 

 done by slowly raising a weighted rod placed along the 



