SEA-FISHERIES LABORATORY. 



157 



Patches Buoy on the second visit. Off New Quay Head 

 the sea was richly populated with the eggs of mackerel. 



On July 12th tow-nettings were taken off Puffin 

 Island, in Red Wharf Bay, and off Kilan Head at the 

 North end of Cardigan Bay. The results showed extreme 

 differences : — 



Off Puffin 

 Island. 



Noctiluca v.ab. 



Sagitta r. 



Crab zoea r. 



Crab megalopa r. 



Evadne — 



Copepoda v.r. 



Calanus v.r. 



Temora v.r. 



Centropages v.r. 



Isias — 



Anomalocera — 



Acartia v.r. 



Brill eggs — 



Sprat eggs — 



Weever eggs — 



Rockling eggs — 



Red Wharf 



Kilan 



Bay. 



Head. 



v.ab. 



— 



— 



c. 



— 



c. 



— 



v.ab. 



— 



v.ab. 



— 



c. 







c. 



— 



fr. 



— 



fr. 



— 



v.ab. 



— 



r. 



— 



r. 



— 



r. 



— 



r. 



The plankton in Red Wharf Bay consisted of 

 Noctiluca only. Off Puffin, the chief constituent was 

 again Noctiluca. The other organisms mentioned were 

 represented by a few individuals. The collection taken 

 off Kilan Head gave quite different results. The 

 plankton there, at that time, was practically composed of 

 Evadne and Acartia in great abundance. Calanus, 

 Centropages and larvae of crabs were tolerably common. 



Collections off Blackpool and at the entrance to the 

 Ribble were taken on July 18th. These stations are only 

 about six miles apart, yet the plankton was very distinct 

 in each place. 



