538 Transactions. 



The third pond has been constructed by enclosing and deepening 

 a small rocky cleft on the north-west corner. The dimensions 

 of this pond are— length, 50 ft. ; width, 26 ft. ; depth, 7 ft. ; 

 and capacity, 50,000 gallons. This pond has a rough rocky 

 bottom and sides, with large crevices and overhanging rocky 

 shelves, and should prove very suitable for its intended purpose 

 — for the introduction of lobsters and crabs. 



The supply-tank for the hatchery has been built in the solid 

 rock immediately behind and about 20 ft. above the level of the 

 embankment. The walls of this tank are of concrete, 1 ft. thick. 

 The dimensions are — length, 33 ft. ; width, 11 ft. ; depth, 8 ft. ; 

 and capacity, 17,000 gallons. The tank is covered with a corru- 

 gated-iron roof. The water is led from this tank to the observa- 

 tion-tanks and hatching-boxes by 2 in. black-iron pipes, fitted 

 with f in. gun-metal cocks where required. The hatching-house, 

 tank-room, and laboratory are all under one roof, the building 

 being 49 ft. long by 21 ft. wide. 



The hatching-house, 25 ft. by 21 ft., is fitted with two sets 

 of Macdonald Patent Tidal hatching-boxes, six boxes to each 

 set, and capable of dealing with from two to three million marine 

 fish-eggs at one time. Provision in the way of tables and cocks 

 is also made for using the Macdonald hatching-jars, of which 

 the station has a good supply. The tank-room is 21 ft. by 

 10 ft., and in this have been built two glass observation-tanks, 

 one 5 ft. by 5 ft., and the other 5 ft. by 2 ft. 6 in. The bottoms 

 and stands have been built of concrete ; the legs are 6 in. by 8 in., 

 and the table of concrete is 4 in. in thickness. The glass is 

 f in. thick, and is fitted into a frame of 2 \ in. angle-iron, which 

 which is let into a groove in the concrete table. Brass overflows 

 are fitted, which are adjustable to any height by means of a 

 rubber stuffing-box. In addition to the four windows it has 

 been found necessary to fit four skylights in the roof of this room, 

 and it is intended to do the same to the hatching-room. The 

 floor of both these rooms is made of asphalt. 



The laboratory is 21 ft. by 10 ft., and is well lighted by 

 three windows facing the north, along which side a wide working- 

 bench runs the full length of the room. A supply of fresh water 

 is also laid on to this room. The room is fitted with Leitz 

 compound and simple microscopes, preserving, dissecting, and 

 mounting apparatus, a large stock of glassware, and a small 

 library. This latter includes sets of the " Transactions of the 

 New Zealand Institute," of the United States American Fish 

 Commissioner's Reports, and of the Scotch Fishery Board 

 Reports, all presented to the station, and a number of other 

 works dealing with biological and especially piscicultural sub- 

 jects. 



