104 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
account of the injury done to young flat-fish; and the 
practicability of artificial Shrimp culture in enclosed areas. 
(3.) Various questions in connection with the Mussel 
(Mytilus edulis) and the Cockle (Cardium edule), and the 
practicability of mussel-culture on various parts of our 
shores. 
Some of these, and various other matters connected 
with our fisheries, have been taken in hand during the 
summer and autumn, and a number of statistics and 
observations (dealing with over three thousand fish) have 
been recorded, in some cases leading to definite conclusions, 
in others still requiring further work. The subjects will 
be dealt with separately below. 
THE DISTRICT, AND ITS PHYSICAL CONDITIONS. 
The district under the control of the Sea-Fisheries 
Committee, and to which our investigations are naturally 
restricted, is practically the area known to Naturalists as 
the L.M.B.C. district, and which has been faunistically 
investigated for some years back by the Liverpool Marine 
Biology Committee. It is the south eastern half of the 
Trish Sea bounding the Lancashire and Cheshire coastsfrom 
Haverigg Point southwards to the North Coast of Wales 
(see Pl. X.), measuring about 50 miles in length and 
40 miles in breadth, to the Isle of Man. In no part of the 
district is the sea of any great depth, as the deep-water 
depression which connects the Clyde district deep-water 
area with the ocean by means of St. George’s Channel 
runs at the other (western) side of the Isle of Man. Inno 
part between Lancashire, Cheshire, and the Isle of Man 
is a greater depth than 28 fms. found, and over the 
greater part of the area the soundings are from 10 to 20 
fms. (see contour lines on Pl. X.). Along the greater 
part of the coast (including practically all Lancashire and 
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