CHRISriANIA, 1901. 407 



§ 15. Control cxjyeriments to check the accuracy of the quantitative 

 methods arc desirable, as well as quantitative hauls for chemical analysis. 



VIIT. 



^ IG. Endeavours shall be made with suitable apparatus to investigate 

 more exactly the organisms which inhabit the lowest water layers im- 

 mediately above the bottom. 



v^ 17. Quantitative investigations of this material are also to he desired. 



IX. 



§ 18. Systematic investigations upon the macroscopic animal and 

 plant life of the bottom, with special reference to the nutrition of food- 

 fishes. 



^ 19. More detailed investigations are desirable upon the bottom fauna 

 and flora in general, as well as vnth reference to their dependence on the 

 ptlijisieal and chemical conditions of the ground. 



Efforts should be made to determine the general topography of the bottom 

 fauna, in order to bring tlie main faunistic regions into relation ivith our 

 knowledge of hydrographical conditions, and the distribution of marine 

 food-fishes. 



Opportunities should also be given to bacteriologists to carry out investi- 

 gations upon the bacteria of the sea-bottom, as well as of the overlying water, 

 and to make determinations of the inorganic nitrogenous compounds present 

 in the water. 



FiSHEKY Statistics. 

 X. 



§ 20. Elaboration of uniform critical statistics of the sea-fisheries of 

 the participating states, especially giving particulars of the food-fishes 

 landed from those parts of the sea which lie within the international 

 area (especially from the Norwegian and North Sea), according to species, 

 place of capture, time of capture, number and weight. 



Particular care is to be given to the preparation of exact statistics of 

 the herring fishery, according to place, time of year, degree of maturity, 

 and dependence on special hydrographic conditions. 



]\Iaterial shall be collected for the preparation of fishery charts, on 

 which the different fishincj grounds, and the fisheries conducted thereon, 

 shall be inserted. 



§ 21. In connection loith the fishery statistics it is cdso desirable to de- 

 termine as precisely as 'possible the fishing grounds from ivhich the indi- 

 vidual catches have been derived. Above cdl, in the ground-net fisheries 



NEW SERIES. — VOL. VI. NO. 3. 2 E 



