222 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



sea, and the data thus obtained have been of the greatest 

 value. I give these (corrected) readings for a number of 

 coastal stations. It is, of course, evident that these data 

 cannot tell us very much concerning the circulation of 

 water, influenced as they are by proximity to the land. 

 It is, however, necessary that we should know the sea 

 temperature at coastal stations, when we attempt to 

 consider physical changes in the sea in relation to the 

 fishery periods, for it is near to the coast that some of the 

 most important local fishing grounds are situated. It 

 will be noticed that four of these coastal stations are 

 situated very closely to each other ; they are : — South 

 Stack, Carmel Head, Middle Mouse Island, and Pt. Lynas. 

 There are no fishing grounds adjacent to these parts of 

 the coast, but they are of importance since the North- 

 easterly drift of water in the Irish Sea appears to be 

 concentrated to. the North and East of the Island of 

 Anglesey, and it was desired to record the temperature 

 hereabout with as much precision as possible. The 

 positions of most of these stations are indicated in the 

 chart on p. 223. 



Hourly observations are also made on traverses across 

 Liverpool Bay, and across the Welsh Bays, but these are 

 not included in our published tables. 



Our own observations are necessarily restricted to the 

 Eastern side of the Irish Sea, to the sea round the Isle of 

 Man, and to the Welsh bays, with the exceptions of 

 occasional incursions into Scottish waters. It has been 

 our privilege* to be allowed to make use of the salinity 

 and temperature observations made by the Irish Depart- 

 ment of Agriculture and Technical Instruction, on the 

 Western side of the Irish Sea and in St. George's 

 Channel, and without these data it would have been 

 * For which we are indebted to Mr. E. W. L. Holt. 



