Fig. 26. Chart of Iceland indicating the principal places mentioned in the text. The dotted lines 

 show the northern limits of distribution of the planktonic stages of the cod during the months 



May— June 1906. 



15 



35 •vo «tS 



60 cm. 



Fig. 27. Average total catch of haddock by the research steamers «Huxley» and «Poseidon» during 



the years 1902 — 1906. Dotted curve represents the relative average number per trawl-hour for each 



centimeter-size, without regard to either time or place. The other curve shows similarly the relative 



average weight per trawl-hour for each centimeter-size. 



