OK THE NORWEGIAN FISlIEHIES : A KEVIKW, 71 



It is consequently to he inferred that the smaller class of spring 

 herring (250 mm.) represents simply the third class of fjord herring 

 (five-point herring) after an additional half-year's growth. Some of 

 the spring herrings, however, only measure 200-220 mm., and it is 

 therefore possible that these fishes constitute an intermediate " yearly 

 class," in which case the spring herring measuring 250 mm. would be 

 four, instead of three, years old. In any event, the smaller class of 

 S])ring herring is three or four years old, and with the larger class of 

 spring herring, has moved in from the sea to shore. 



Thus the life-history of the ocean herring may be summarised as 

 follows. In its young condition the herring inhabits the inshore waters 

 of the fjords until it attains a length of about 8 ins. (2f years old), when it 

 gradually moves out to sea and into deep water, gradually assuming the 

 habits of the ocean herring, of which it forms the youngest yearly 

 class. The young herring are clearly much more independent of 

 changes in the coastal waters than the full-grown fish, since they live in 

 the fjords during all seasons of the year. 



Readers of Hjort's interesting contribution to fishery literature will be s])arecl 

 some trouble by noting the following errata, which have clearly escaped the author's 

 attention : 



Te.xt, p. 25, seven lines from bottom — for 3r44: read 3r34 (cf. Hydrographical 

 tables, p. 25, and Plate I., fig. 4). 



Text, p. 47, station 170— for 34-51 read 33-51 (cf. Hydrographical tables, p. 43). 



Hydrographical tables, p. 13 — for Plate II. read Plate III. 



Chart 1. The meridians on this chart are based on Christiania = 0, instead of 

 Greenwich. The longitude of particular stations, however, seems to be always based 

 on the system generally adopted. 



Chart II. The parallel of latitude marked 60" shouhl be 59° 30'. 



