B. HELLAND-HANSEN 



To these must be added areas with varying depths: 



F. A narrow strip along the East Coast of Scotland and North Eng- 

 land, with depths up to 30 fathoms. 

 L. The southerly portion of the North Sea from the Channel to 

 Flamborough Head and Terschelling, with depths up to 30 fathoms. 



N. We have so few measurements from the Skager Rak in our material 

 that this area has not been regarded in the text. 

 From the four 

 maps in Fig. 2 we 

 can see the situa- 

 tion of the different 

 stations and their 

 distribution accord- 

 ing to seasons. It 

 will be noticed that 

 they are almost 

 entirely located in 

 the southerly por- 

 tion of the North 

 Sea (south of Lat. 

 56° N). There are 

 no doubt a consider- 

 able number of 

 stations in the 

 northerly portion 

 also during the 

 period January- 

 September; but 

 nothing like so 

 many as further 

 south. We can see 

 too that far more 

 stations have been 

 established during 

 the summer than 

 in the winter. 



In the two 

 following tables we 

 have set down in 

 detail' the number 



of trawl-hours 

 answering to the 

 catches of haddock 

 examined and which 



I Negative trawl-liours omitted, as previously mentioned. 



Fig. I 



