220 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



theories witli whof<e errors I T^'as well acquaintecl, errors chiefly owing 

 to the fact that all the conditions for a satisftictory develoi)ment of these 

 theories had not been fulhlled. 



If by the foregoing treatise I have succeeded in making the accumu- 

 lated scientijic material more accessible^ and in directing attention to the ah- 

 solnte necessity of more complete and more exhaustive scientific investigations 

 regarding the important fishery-question, my principal object has been 

 reached. 



