19983) THE GREY MULLET FISHERY IN JAPAN 255 
entirely sunk under the surface of water, while in other cases only 
one side is sunk. In rocky districts where the sea is generally 
deep, the mullet swims very close inshore. The net is often set in a 
bay having a slight curvative, because such a place is more convenient 
than an open coast or a coast deeply indented. In the former case 
the sea is more rough, while in the latter case the fish does not come 
often. The movement of the fish is observed from towers on land, 
and the communication between them is made by signals. When 
the fish come on the net, the sunken side or sides are immediately 
Bigs) 2; 
raised by hauling ropes which are fastened to the sides of the net. 
Ropes are held by anchored boats, and are hauled by a signal from 
the watch-tower nearest to the net. Such a dip-net is sometimes 
accompanied with two long wings, which are used to encircle the fish 
and force them to go on to the sunken net as well as to prevent 
them from escaping. As the quick performance of work is neces- 
sary for this fishery, numerous boats and men are generally em- 
ployed. 
The pound-net.—The apparatus (Fig. 5) next to be described 
is not a proper pound-net, because fish do not come into the net by 
themselves, moreover there is no special device to prevent the 
Fig. 3. 
fish which enter the net from going out again. The net is spiral 
in shape. It is supported by bamboo sticks, stuck into ground, and 
consists of three different parts—outer, middle, and inner or central. 
