154 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Bar Shank net caught 746 fish and 11J qts. of shrimps. 

 Ordinary Shank net, 561 fish and 8J qts. shrimps. 

 Ordinary Shrimp trawl, 1950 fish and 6 qts. shrimps. 



(4) Another experiment was made on the Blackpool 

 ground with the three nets in the month of March and 

 the following is the result : — 



Bar Shank net, 38 fish and 1J qts. shrimps. 

 Ordinary shank net, 865 fish and 9 qts. shrimps. 

 Ordinary Shrimp trawl, 3076 fish and 2 J qts. shrimps. 



(5) In the same month (March) an experiment was 

 made in the Mersey with the three nets with a result as 

 follows : — 



Bar Shank net caught 536 fish and 12 qts. shrimps. 

 Ordinary shank net, 365 fish and 6J qts. shrimps. 

 Ordinary Shrimp trawl, 1177 fish and 13 qts. shrimps. 



(6) In August another experiment was made on the 

 Blackpool closed ground with the following result : — 



Bar Shank net caught 502 fish and 2 qts. f gill shrimps. 

 Ordinary Shank net, 330 fish and 2 qts. shrimps. 

 Ordinary Shrimp trawl, 3362 fish and 2 qts. shrimps. 



" Drift Bottles and Surface Currents." 



In connection with the investigation of the surface life, 

 in discussing the appearance and disappearance of swarms 

 of certain Copepoda and Medusae, and in considering the 

 possible influence of the movements of such food matters 

 upon the migrations of fishes, and also in connection with 

 the movements of the fish ova and floating embryos, it 

 occurred to us, that it would be worth while to try to 

 ascertain the set of the chief currents, tidal* or otherwise 



* The tidal cm-rents of the district are already to some extent known, and 

 are marked in the charts and given in books of sailing directions, as Admiral 

 Beechy's "Tidal Streams of the Irish Sea ;" but we desire to ascertain the 

 resultant currents from all influences which would affect the drift of small 

 floating bodies. 



