CAXADIAX FI.'^HERIES EXPEDITIOX, 191.'rlo 



135 



By a study of this table, and comparison of the averages with due regard to their 

 errors, it will be seen that all the samples are very much alike. Among features 

 especially characteristic may be noted, that f, is on an average less than t.. and that 

 average values of less than 1 cm. are not reached until t„; further, that #, is more 

 than half as great as t^. 



Some variation is, however, noticeable between the separate samples. It is found 

 that several of the largest samples exhibit tlie greatest difference, and it will there- 

 fore be desirable to inquire how far any degree of regularity can be discerned in the 

 variation, and whether it is so considerable as to suggest the probability of its being 

 due to other causes than fluctuations of sampling. In order to ascertain this, the 

 samples were first divided into three season -groups, one comprising the samples from 

 the spring of 1914, another those from the autumn of the same year, and a third those 

 from the spring of 1915. Table 14 shows the seasonal averages with corresponding 

 standard errors . 



Table 14. — The samples from Newfoundland arranged according to season of capture. 

 Table showing averages and errors for growth dimensions t^-t^^ for year class 

 1904, all samples from each season being taken together. 



Season. 



1914, Spring . . 



1914, Autumn. 



1915, Spring.. 



Total . . . 



No. of 

 individ. 



238 

 240 

 128 



606 



6 20 

 6 08 

 600 



6- 14 



Oil 

 012 

 13 



07 



6- 99 

 6 98 

 6-99 



6 98 



07 

 008 

 09 



05 



5-42 

 5 39 



5-51 



5 43 



006 

 006 

 08 



00^ 



3 21 

 3 34 

 :V38 



3 30 



0-04 

 004 



006 



03 



2-69 

 2-74 



2-8. 



274 



04 

 005 

 006 



03 



219 

 200 

 2-16 



2 11 



1 54 

 137 

 154 



1-47 



108 

 106 

 114 



1-08 



0-83 

 92 



0-89 



0-88 



Uo 



64 

 o 75 

 74 



71 



It is not easy to discover any essential difference between the seasons here; ^i 

 falls a little, #2 shows no change, t?. is likewise unchanged, t^ and h rise slightly, 

 while i^, L and f^ are lowest in the autumn. All these differences are, however, 

 insignificant and lie within the limits allowable for fluctuations of sampling. Also 

 each seasonal group presents the same total view of the growth, as seen in each 

 separate sample or in all samples taken as one. 



A somewhat similar result is arrived at by arranging the samples according to 

 locality, as in table 15. 



Table 15. — Newfoundland samples arranged according to locality of capture. Table 

 showing averages for growth-dimensions t^ — /,„ for year class 1904, all samples 

 from each locality being taken together. 



In this case, the differences arc much more conspicuous. The growth dimension ^i 

 is lowest for White bay, and highest for St. George's bay. the reverse being the case 

 with t.^, while the dimensions t.^ — t^ are lowest for St. George's bay. 



