144 



DEPARTMENT OF THE NATAL SERVICE 



Here again the resemblance between the two samples is striking, while the diffe- 

 rences are insignificant. Only in two instances does the value of the fraction ~j" 



exceed 1, which differences, however, also lie well within the limits for fluctuations of 

 sampling. 



Table 28 shows these two samples compared with regard to the remaining age 

 groups. 



Table 28. — Comparison of the divergent sample from St. George's Bay with the sample 

 from North Sydney by help of averages for all year-classes presenting a reasonable 

 number of specimens. 



Year group. 



1911 



1910 



1909 



1908 



1907 



190G 



1905 



1904 



1903 



Sample. 



i St. George's Bay 

 I North Sydney . . . 

 ( St. George'.s Bay 

 t North Sydney . . . 

 f St. George's Bay. 

 I North Sydney . . 

 ( St. George's tiay 

 \ North Sydney . . 

 fSt. George's Bay 

 \ North Sydney . 

 t St. George's Bay 

 ( North Sydney . . . 

 I St. George's Bay 

 \ North Sydney. . . 

 j St. (xeorge's Bay 

 t North Sydney 

 /St. (Teorge's Bay 

 \ North Sydney. . . 



tn 



0-5 

 6 



This table strongly confirms the impression furnished by the previous ones, of 

 similarity between the two samples. We may safely say that the resemblance is no 

 less marked as regards growth of the individuals than it was seen to be in respect of 

 age composition. 



Comparison of samples from West Ardoise, Locl-eport, and west of Port Hood 

 (station Jt2). 



Only young fish of the 1911 year-class are here numerous in all four samples, the 

 calculations as to errors of averages and comparison, on the basis of the same, have 

 therefore been restricted to this group. 



Table 29 shows the averages for this year-class together with the corresponding 

 standard errors. 



Table 29. — Averages (A) and standard errors (e) for the year-class 1911 in three 

 samples from the Atlantic coast and one from west of Port Hood. 



Locality and Date. 



W. Ardoise, .July, 1914 



August, 191 4 . 

 Lockeport, November, 1''14 

 W. of r . Hood, July, 19 1 5 



No. of 

 individuals. 



G3 



25 

 57 



8fi 



12-44 

 12 99 

 12 14 

 12.68 



0-21 

 0-34 

 0-24 

 0-21 



8-12 

 872 

 7-76 

 S-44 



Oil 

 0-28 

 14 

 12 



482 

 443 



4 85 



5 12 



014 

 0-20 

 016 

 010 



2 07* 

 1 45* 

 2-20* 



3 38 



06 

 09 

 007 

 09 



