APPENDIX F: HENKING _ 28 — 



As appears from the foregoing data, the periods in the occurrence of the food-fiishes 

 make a somewhat "kaleidoscopic and varied" picture. Perfect clearness cannot as yet be 

 brought into the matter, we are still too much at the beginning of the investigations. 



As yet we know too little, of the living conditions of the various species in the different 

 parts of the sea, of their food, down to the plankton, and of their rate of growth. Even 

 regarding such an important feature as the spawning-period, every year brings .new 

 surprises. With increasing knowledge of this region and a continuation internationally 

 of the hydrographical investigations of the sea, we shall perhaps succeed in ascertaining 

 the order of the fishery-periods in the North Sea, and their causes. 



MISPRINTS 



Page 6, Line 8, for: 35-35 °/oo read: 35.25 °/oo 

 — 9, — 13 from beneath, for: May and .'August read: February and May 



