60 
BULLETIN OP THE BUREAU OF FISHERIES 
It appeared, therefore, that the 22 to 23 inch cod, D, caught in May were of the 
same stock that were 20 inches iong in September, 1926. (Fig. 19, No. 2.) It will 
be noted, also, that the 2-inch advantage in length which the Great Rip fish possessed 
in September, 1926, over the Round Shoal cod remained the same in May, 1927. 
The C school of cod which formed a good part of the total stock of fish at Great Rip 
in September, 1926, was practically out of the picture in May, 1927, just as it was 
at Round Shoal buoy. 
Figure 20. — Length-frequency distribution of cod caught between Round Shoal buoy and Rose and Crown buoy. 
No. 1 = 1,159 fish taken May 4-7 (solid curve) and 878 fish taken June 16-25, 1927 (broken curve). No. 2=1,468 
fish taken August 31 to September 3, 1927. No. 3=275 fish taken October 14-17, 1927 
Tagging on the Chatham grounds for the first time during the present investi- 
gation was done in May, 1927. It was interesting to find that there, as on the 
Round Shoal buoy grounds, the V cod, with a peak at 20 inches, formed the domi- 
nating school. (Fig. 21.) They were not, however, as sharply defined as were the 
