SEA-FISHERIES LABORATORY. 143 



N.W. Light Ship. Red Wharf Bay. 



Coscinodiscus concinnus fr. ... — 



Biddulphia mobiliensis r. ... — 



Ceratium tripos r. ... — 



Noctiluca r. ... fr. 



Pleurobrachia 1 ... — 



LT Autolytus 1 ... fr. 



Sagitta r. ... ab. 



Tomopteris — ... r. 



Podon r. ... — 



Hyperia galba 2 ... — 



Parathemisto oblivia 2 ... — 



Copepoda ab. ... c. 



Calanus r. ... r. 



Temora fr. ... fr. 



Centropages hamatus r. ... — 



Paracalanus — ... r. 



Acartia clausi v. ab. ... fr. 



Oithona similis fr. ... — 



Oikopleura r. ... — 



The differences between these two collections are 

 quite as marked as in the previous examples. There was, 

 evidently, a more abundant supply of life out in the open 

 sea than near the land, and it will be noticed that diatoms 

 were absent from territorial waters. There was a great 

 difference in the amount of Copepoda in the two areas. 

 Acartia clausi was present in immense numbers offshore, 

 while in Red Wharf Bay the number of this particular 

 species was considerably reduced. 



On January 22nd one tow-netting was taken in 

 Port Erin Bay, on the following day two were taken in 

 Cardigan Bay by the steamer, and one by Capt. Jones in 

 Carnarvon Bay. The tow-netting from Port Erin is not 

 strictly comparable with the others, but is given to show 

 the difference between the plankton from the Central area 

 on one day, and that from close inshore in the Southern 

 area on the next day. 



