SEA-FISHERIES LABORATORY. 2*27 



Cladocera. Podon intermedium was present during both. 



visits, and Evadne in October. 



Laryal Crustacea were only present in the November 



gatherings, and consisted of Copepod nauplii (very 



abundant], Cyclops stage of Lernrra few, larval Crangon 



few, Porcdlana zoea rare, zoea of other species of crabs 



frequent. 



Ascidians. Oikopleura occurred in all the collections. 



Two specimens of a young Clupeoid fish 23 milli- 

 metres long were taken in November. 



A. Scott. 



General Eemarks. 



In considering the results of the trawling operations 

 in Luce Bay for the last three years, one cannot help 

 making comparisons between the condition of this ground 

 and that of our own in-shore waters on the West Coast of 

 England and that of Wales. Our primary object in going 

 to Luce Bay has been to secure mature plaice for hatching 

 purposes, for general experience of our own in-shore 

 grounds has shown that it is only by an unreasonable 

 expenditure of time there that a stock equal to that which 

 may be caught even in a single day's trawling in Luce 

 Bay can be obtained. Four years ago the " John Fell " 

 spent the greater part of a week in endeavouring to obtain 

 mature plaice for Piel on the grounds in the Southern 

 part of our district, and was most unsuccessful, only five 

 obviously mature fish being obtained. Even such an 

 admitted " plaice ground " as Eed Wharf Bay, off the 

 Xorth Coast of Anglesey, yields poor results. This latter 

 area may be compared with Luce Bay. It is true that 

 it has quite a different exposure, but it is the nature of the 

 bottom, physically and biologically, which, no doubt, is 

 the principal factor in rendering each area a favourite 



