3 70 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



It will be seen that there is no complete series of 

 observations, including at least one haul in each month of 

 the year in either Table I. or II. On this account and 

 also with the object of eliminating as far as possible 

 accidental conditions and variations, all the hauls taken 

 during the Januarys in each of the years 1898-99 have 

 been collected, and from these the total fish and shrimps 

 caught and the averages per haul have been calculated. 

 The same has been done for the other months, and the 

 results are tabulated in Tables III. and IV. III. deals 

 with the portion of the ground considered in Table L, and 

 IV. with the portion considered in Table II. In Table 

 VI. all the fish caught in the third quarters (July, August, 

 September) of each of the }^ears 1898-9 are collected, the 

 numbers of hauls taken in each of those quarterly periods 

 are given, and the average catches are calculated. In 

 Table V. an attempt is made to compare the varying 

 destruction of young fishes at different times and on the 

 different grounds. 



We give on next page a map of the Mersey Shrimping 

 Ground which has been reduced from the Liverpool Dock 

 Board's Chart of the area. It represents the extent of the 

 sandbanks at low water of a spring tide ten feet below the 

 level of the Old Dock Sill Datum at Liverpool. Almost 

 the whole of the area shown is regularly fished over. 

 More exactly, a line drawn from the N.W. extremity of 

 East Hoyle Bank to Newcome Knoll Buoy, and from 

 Newcome Knoll Buoy to the hist red conical buoy in 

 Queen's Channel, defines the seaward limit of the Burbo 

 Bank area. Shrimping is carried on over almost all this 

 ground, the extent of which is roughly lb' to 18 square 

 miles. Queen's Channel, Formby Channel, Crosby 

 Channel, Horse Channel, and the western portion of Rock 

 Channel are also regularly fished. Shrimping is also 



