148 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



water. Steamer to work outside the banks up to and 

 including the Blackpool closed grounds, upon which one 

 haul of fish trawl and one haul of shrimp trawl should 

 be taken for comparison with hauls immediately before 

 upon ground lying immediately to the south, off the 

 Ribble. Pick up boat and get results, and then run to 

 Fleetwood for night. 



Fourth Day. -Leave Fleetwood for Morecambe Bay 

 and Barrow Channel, taking* a fishing boat in tow and 

 setting her to work in the shallow water with shrimp 

 trawl, while steamer uses fish trawl further out, as far 

 north as estuary of Duddon, but all inside the 6 or 7 

 fathom line. In evening pick up boat and return to 

 Fleetwood for week end, when general results of month's 

 cruise would be seen to and put in order. 



It would be well to send oif certain collections when 

 in port at the end of each week to the central laboratory 

 in Liverpool. 



The lines for trawling along each day in this scheme 

 have been laid down on the chart, in consultation with 

 Mr. Dawson, and along each line the same series of 

 observations should be taken. 



The observations made should include : — 



(1) Drags with the fish trawl and shrimp trawl. 



(2) Plankton collections with surface and bottom 



horizontal tow-nets, and also with quantitative 

 vertical nets. 



(3) Physical observations with thermometers, hydro- 



meters, water-bottles, etc. 



We may consider a few further details under each of 

 these headings : — 



I. Fish and Shrimp Trawling Observations. — (a) Drags 

 should be made under strictly uniform conditions - 

 that is, the same size, form and mesh of trawl net should 



