SEA- FISHERIES LABORATORY. 121 



and Carnarvon Bays in May, June, and July. Rockling eggs 

 were more abundant in the plankton collected in the month 

 of May than in any of the other months mentioned above. 

 The largest number were obtained from a sample collected 

 off Nelson Buoy on May 9th. It was estimated that one 

 thousand five hundred eggs were present. Eight hundred 

 were found in another sample from the same area collected on 

 May 19th. 



Ctenolabrus rupestris, Linn. — Jago's Goldsinny. 



A very small pelagic egg, which was identified as that of 

 Jago's Goldsinny, occurred four times in the plankton collected 

 in July and August. It was found in Carnarvon Bay on July 

 2nd ; Cardigan Bay on July 6th ; South end of Blackpool 

 closed ground on July 25th ; and off Great Orme's Head on 

 August 7th. The sample taken off Blackpool contained thirty- 

 four goldsinny eggs, which was the largest number obtained. 



Scomber scomber, Linn. — Mackerel. 



It is rather surprising that although there was a great 

 abundance of this fish in the Irish Sea in the summer of 1913, 

 only three eggs were obtained and each one from a widely 

 different area. One was found in plankton collected at the 

 entrance to the Mersey on July 8th. Another in Carnarvon 

 Bay on July 22nd, and the third in Tremadoc Bay also on 

 July 22nd. It is probable that very few of the fish spawned 

 in the Irish Sea during their visit. 



Psetta laevis, Rondel. — Brill. 



Eggs, identified as brill, were found on two occasions in 

 the plankton collected by the steamer in 1913. Two were 

 obtained from a sample taken ten miles N.N.W. from Piel 

 Gas Buoy on June 2nd. Another two were present in a shear- 

 netting taken near Carnarvon Bay Light Vessel on June 4th. 



