17'i TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



time become very abundant along the Welsh roast 

 extending to Fishguard Bay, but apparently did not 

 conic very close to the land. None of the tow-nettings 

 taken by the steamer produced a single copepod, while 

 those taken off Tremadoc, Abcraron and Kilan Head, 

 yielded six species. Out of a total of thirty organisms 

 only eight occurred between two and three miles from the 

 land. The alga was entirely absent from the tow- 

 nettings taken by the Fishery Officers. The collection 

 from Port Erin showed a great change from the previous 

 month, and twenty organisms were noted. Chcetoeeros 

 had entirely vanished, its place being taken by a swarm 

 of Rhizosolenia which was represented by a few indivi- 

 duals in May. 



The organisms in Cardigan Bay plankton attained 

 their highest number in -Inly. Eleven collections were 

 taken and thirty-six different forms, with a fairly 

 uniform distribution, were found to be present in the 

 area. No other portion of the Irish Sea, at any time 

 during 1905 contained plankton so varied as occurred in 

 this bay in the months of May, June, July and August. 

 Various unusual forms appeared in July such as the 

 Larvae of the crustaceans Jaxea, Squilla, and lobsters, also 

 the rare copepods Pontella lohiancoi and Monstrilla 

 anglica. The gelatinous alga was gradually disappearing 

 from the water. The only areas that contained any 

 were Carnarvon Bay and Bahama Hank off the Isle of 

 Man. Diatoms were practically absent iii all the regions 

 investigated, a very leu Rhizosolenia were noted at Port 

 Erin and in Cardigan Hay, and Coscinodiscus at Port Erin 

 only. 



The low-nettings taken during August numbered 

 fourteen. Ten of these were collected by the steamer, 

 and the remaining four by the Fishery Officers. A con- 



