nailed or laced to its rectangular frame. This narrow 

 sleeve-shaped net has a length of 23 to 24 feet ; at the 

 mouth end the meshes measure 15-17 millimetres 

 (about f inch) and diminish to 10-11 millimetres (f inch) 

 towards the free extremity. Except when letting out 

 water from the ponds the frame of the sleeve net is kept 

 raised to the top of its grooves, the net itself being- 

 carried backwards and hung over the framework of 

 the sluice gates as shown in PI. Ill, Fig. 4. To 

 facilitate the working of the sluice a plank is laid 

 across behind each of the three movable frames (see text 

 Fig. 3.), and a plank way, 6 feet wide, crosses the 

 sluice at the summit of the embankment. 



The Method of Stocking with Fry. 



This operation depends upon the fact that the fry of 

 certain species of sea-fish resort to estuaries during the 

 early period of their life, led by an instinct which impels 

 them to swim against any current they encounter. Hence 

 to avoid the labour and expense of collecting the required 

 amount of fry in the sea by means of nets, the sluices of the 

 ponds are manipulated in such a manner as induces shoals 

 of fry to enter the ponds voluntarily. The operation is 

 conducted in the following manner. Each day during 

 the period of neap tides at the times when fry are expec- 

 ted, as soon as the tide begins to recede the wire screen 

 at the seaward end of the sluice is raised, the one at the 

 opposite end being kept in position; one of the sluice 

 shutters is then raised sufficiently to create a current 

 flowing from the pond to the sea. Following their instinct, 

 any small fish which are near the sluice swim against 

 this current and eventually find their way into the sluice 

 channel. When the man in charge of the operation 

 judges the time fit, either because a large number of fish 

 have congregated or because the tide has turned and 

 would shortly cause a change in the direction of the 

 sluice current, he replaces the seaward screen and closes 

 the sluice. The imprisoned fry are then fished out 

 of the sluice with the aid of a square-framed dip-net 

 and transferred to the adjacent pond where they are 

 kept till such as survive to maturity attain marketable 

 size and condition. 



