338 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



does not show a proportionately still larger catch than it 

 does nrust be due to the fact that a large proportion of the 

 organisms in the sea are not at the surface, but some way 

 below. We have given elsewhere evidence that the most 

 populous zone is really above the part strained by these 

 vertical nets (20 to 10 faths.), but the water just below 

 and about 10 faths., sampled by the Nansen net, is 

 probably on many occasions richer in organisms than the 

 top few feet through which the surface net is hauled. 



Station I. 



Easter. 



No. of Hauls. 



Range in c.c. 



Average 

 Catch. 



1907 

 1908 

 1909 



24 

 23 

 19 



0-5 

 0-5 



to 20-5 

 „ 6-0 

 „ 10-7 



11-8 

 2-2 

 3-9 



Station I. 





Summer. 





No. of Hauls 



Range in c.c. 



Average 

 Catch. 



1907 



21 

 30 



7 



1-0 to 7-5 



0-2 „ 7-5 

 0-1 „ 2-0 



2-7 



1908 



1-0 



1909 



0-6 







Some Vertical Hauls in Deeper Water. 



We have a series of five dates, two on adjoining days 

 in April and three early in August, when series of 

 vertical hauls were taken at a station in mid-channel with 

 closing nets, at specified zones of depth between 60 faths. 

 and the surface. 



The more important results are shown in the 

 following table : — 



