616 REPORT ON THE EGGS AND LARVAE OF TELEOSTEAN FISHES. 



Record of Demersal Eggs. 



The Cottus eggs could nearly always be easily hatched out, even when 

 obtained in the earliest stages of development, but neither of the 

 two batches of eggs of Agonus cataphractus showed any signs of 

 development, though they retained their more or less transparent 

 appearance for weeks. I have only had two larvae of this species 

 in the tow-nets, one on February 6th (7 mm. long) and the other on 

 March 27th (13"5 mm. long), both taken in Cawsand Bay. 



The eggs of Gobius niger also failed to hatch. They were attached 

 to a large stone, which had to be broken up before it could be carried 

 to the Laboratory. Possibly the shock to the eggs in breaking the 

 stone caused their death. 



The Gobius pictus eggs measured about "80 mm. longer axis and 

 "63 mm. across the widest part, and the larvae hatched from these 

 eggs measured about 3'0 mm. in length. In shape, as well as in size, 

 the eggs agreed exactly with those previously referred to this species 

 by Holt and Byrne (Journ. M. B. A., v., p. 336), and there can be little 

 doubt that this identification is correct. 



