SEA-FISHERIES LABORATORY. 281 



The last line shows that the same general proportions 

 hold good in the latter part of August, when the catch is 

 composed almost wholly of Copepoda. 



In August some vertical hauls to the surface were 

 made with the Hensen and Nansen nets out in deep water 

 (60-70 fathoms), in mid-channel between the Isle of Man 

 and Ireland, for comparison with similar hauls where the 

 net was closed after having traversed some definite zone 

 of water; and, as would be expected, the complete 

 vertical hauls generally gave a larger result than the 

 partial ones — except in a few cases where the haul was 

 vitiated from the net apparently having gone so near 

 bottom as to have taken in some mud stirred up by the 

 weight. 



Aug. 



24— Station A. 



— Nansen, 



60-50 fat] 



is. =0-3; 



60-35 fat] 



tis. =0 - 5 c c. 





24— Station B. 



— „ 



60-45 , 



, =0-2; 



60-0 



, =1 „ 





26— Station L- 



— 5> 



25-15 , 



, =0-25; 



25-0 



, =1 „ 





31 — 



— „ 



24-10 , 



, =0-7; 



24-0 



, =1-5 „ 





31 — 



— Hensen, 



24-10 , 



, =03; 



24-0 



, =0-6 „ 



Sept. 



3— 



— „ 



20-10 , 



, -0-25; 



20-0 



, =0-75,, 





3— 



— Nansen, 



20-10 , 



, =0-5; 



20-0 



, =0-7 „ 





4 — Station A. 



— „ 



60-30 , 



, -0-5; 



60-0 



, =1 „ 





4— Station B. 



— „ 



60-30 , 



, =0-3; 



60-0 



., -0-75,, 





4— 



— Hensen, 



60-30 , 



, -04; 



60-0 



, =0-5 „ 



There were also hauls on the last date through the 

 zone 60-50 which showed still smaller amounts, 0*05 to 

 O'l c.c. An attempt was made to discriminate more 

 minutely between the zones on a few occasions — e.g. 

 September 12th, in 65 fathoms. 



60-50 60-30 60-0 30-20 20-10 10-5 



Hensen 01 01 025 01 015 025 



Nansen 2 3 12 0'15 03 02 



These and other hauls confirm the opinion we arrived 

 at, from the use of the open horizontal tow-nets at 

 different depths, that the most abundant zone of life is 

 about ten fathoms, or between that and the surface — say, 

 between ten and five fathoms. 



