SEA-FISHERIES LABORATORY. 295 
this work, and during this period 266 gatherings were 
taken in the 27 working days, an average of nearly 10 per 
day. On one expedition (August 17th) 25 gatherings were 
taken; 21 of them being in a small area of only about 
three miles extent, as follows :— 
Stat. A.—Nansen net, 60-0, 60-0, 50-0, 20-0. 
Hensen net, 60-50, 50-40, 40-30, 30-20, 20-10, 10-0. 
Two surface nets, and one weighted net. 
Stat. B.x—Nansen net, 70-0, 40-0, 20-0. 
Hensen net, 70-60, 60-30, 30-20, 20-10, 10-0. 
These Stations A and B, which were only visited on 
occasions, are out in mid-channel, 13 to 14 miles N.W. 
from Bradda Head, in depths of 64-74 fathoms, and aboui 
half-way to Ireland. Station IL, which was worked more 
frequently, is 10 miles off land, and well outside the 
20 fathom line, so all of these localities may be regarded 
as being in that central area of the Western Channe! 
which is little affected by tidal currents. Station I, five 
miles from Bradda Head, shows more tidal influence than 
Station II, but less than localities further inshore. 
Station III, alongshore, to the north of Bradda Head, is 
in comparatively quiet coastal water, and may serve to 
compare with Station I, further out to sea, and*on the 
other hand with Port Erin Bay. Stations IV and V are 
in strong currents close to the Calf Island, but are on 
opposite sides of the Island and exposed to entirely distinct 
influences, Station V being in the tide that sets up the 
east side of the Isle of Man; while Station IV is in the 
tidal system of the west side. When we consider the 
tidal and’ temperature variations in these strong currents 
close to land, it is not surprising that the plankton 
catches show great irregularities at these: inshore Stations. 
Stations I, II and III (map, fig. 10, p. 278) thus seem 
to be the most instructive for purposes of comparison, and 
so we have prepared the following table showing the 
U 
