82 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



On March 16th the steamer arrived with a farther 

 supply of eggs from Plaice and Flounder. None of the 

 Flounder eggs, and very few of the Plaice eggs, had been 

 fertilized. On the 18th March a supply of Cod eggs was 

 brought in by the steamer. Many of these were fertilized, 

 and the development proceeded rapidly. 



The spawning grounds were again visited on March 

 22nd, and a number of sailing trawlers were boarded 

 when hauling in their nets. Many mature fish had been 

 captured, and a supply of Cod, Haddock, Plaice, Flounder, 

 and Dab eggs were obtained. The eggs of the Haddock, 

 Plaice, and Dab did not fertilize, nor did many of the 

 Cod and Flounder. 



The surviving eggs of the Plaice fertilized on the 16th, 

 of the Cod on the 18th, and of the Flounder and Cod on 

 the 22nd, and 23rd March developed satisfactorily, hatch- 

 ing out at the end of eighteen, sixteen, eleven, and thirteen 

 days respectively. Throughout these periods a consider- 

 able daily mortality was observed, which was, no doubt, 

 due largely to the condition of the eggs when fertilized. 

 In several cases the larvse were clearly visible through the 

 membrane of the eggs when death occurred. 



Through the kind permission of the Fishery Board for 

 Scotland, the steamer was allowed to visit the Clyde and 

 trawl there for spawning fish. Three visits were made, 

 but on only one of these, the first, were mature fish 

 obtained, and the eggs successfully fertilized. The eggs 

 were from Plaice, and the quantity on arrival at Piel 

 measured 150 cubic centimeters. This was by far the 

 greatest individual quantity of eggs received during the 

 season. On the first visit the eggs of the Witch, Dab, 

 Grey Gurnard, and Haddock were also obtained; but the 

 Gurnard and Haddock eggs did not fertilize. The Dab 



