SEA-FISHERIES LABORATORY. 



147 



only a few specimens were captured by the bottom tow- 

 nets. It will be noticed, too, that only one plaice egg 

 was taken along this fifteen mile line. 



The conditions prevailing in the open sea, off the 

 North-East end of the Isle of Man, about the middle of 

 February, are shown by the following three collections, 

 taken in the vicinity of Bahama Bank on February 

 20th: — 



(l) 



Sagitta ab. 



Tomopteris — 



Autolytus — 



Copepoda c. 



Calanus fr. 



Pseudocalanus ab. 



Paracalanus fr. 



Centropages r. 



Acartia r. 



Crab zoea — 



Eurydice — 



Hyperia — 



Mysis — 



Nyctiphanes — 



Plaice eggs ab. 



Flounder eggs r. 



(2) 



(3) 



c. 



ab. 



— 



r. 



r. 



r. 



c. 



c. 



... fr. 



ff. 



ab. 



ab. 



fr. 



fr. 



r. 



r. 



r. 



r. 



— 



r. 

 1 

 1 

 1 

 1 



— 



ab. 



fr. 



r. 



r. 



The differences in these are very slight, and show 

 that the distribution was fairly uniform. The presence of 

 the higher Crustacea in the third haul, the reduction in 

 quantity of Sagitta in the second haul, and the decrease 

 in plaice eggs in the third haul are the only important 

 features. 



On February 21st one tow-netting was taken in 

 Red Wharf Bay and one in the open sea about twelve 

 miles North-East from the bay. Considerable change 

 in the collections is shown in the following list of 

 organisms : — 



