of the Fishery Board for Scotland. 201 



and in summer warmer than that beneath. The conditions in the loch 

 basins of the Firth of Clyde are quite different, and although they are 

 now being studied, are not yet properly known. 



It would be very important to extend similar observations to the other 

 firths, estuaries, and rivers in Scotland, and to supplement them by care- 

 ful chemical analysis. 



APPENDIX F.— No. XIII. 



PvEPOKT OF THE ST ANDREWS MARINE LABORATORY, 

 No. III. From 1st April 1885 to 31st December 1885. By Pro- 

 fessor M'Intosh, M.D., LL.D., F.R.S., &c. (Plate VIII.). 



I. General Remarks. 



Period Covered by Report. 



The period over which this (the third) report extends is seven months. 

 The first report was made some months before the Marine Laboratory was 

 fitted up, the second four months after it was finished. In future, how- 

 ever, it is probable that the report will cover the usual period, viz., 

 twelve months. 



Structural Changes. 



The structural improvements since last report have been few, and con- 

 sist of the opening of an eastern window in the main work-room, so that 

 investigations can be carried on in good light during the warm weather, 

 and without exposure to the glare of the sun ; and the fitting-up of 

 shelves and a light bookcase in the same apartment and in the small 

 accessory work-room. A microscopical cabinet and three suitable work- 

 tables have also been procured, so that the laboratory now presents 

 greater conveniences for the workers. 



Desiderata. 



As mentioned in the last report, an open-air tank of large dimensions 

 would be a useful acquisition in connection with the investigations on the 

 Scotch Fisheries. The introduction of a fresh water-pipe and accessories, 

 a canvas or other shade over the western windows and high-level tank, 

 and the aeration of the tanks by an inexpensive series of aerators, the 

 addition of nozzles with stop-cocks, and the lighting of the laboratory 

 with gas, are also much required. Moreover, the occasional use of a 

 steam-vessel for procuring ova and carrying out other investigations is 

 indispensable. Time would also be largely saved if a more speedy access 

 to the laboratory be obtained instead of the detour at present necessary. 



Remarks on Food-Fishes. 



Mode of Capture of Food-Fishes by Liners. 



The boats leave the harbour at various , times, but generally so as to 

 reach the fishing-ground before daylight. Thus in the summer months, 



