250 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



the result is unsatisfactory ; if they are ten to one the graduation 

 is not unreasonable, but the exact value when a result must be 

 discarded cannot be given. As, however, it is clearly impossible 

 to imagine any test which can fix an absolutely definite 

 standard, there is no reason for objecting to the particular 

 method because it fails to do so." 



The results of these calculations of P are tabulated below :- 



Table I. — Calculation of P on sub-samples of Manx herrings 

 taken during 1914, on characters D and l.cp.l. 



Character D. 



1914. 



June 

 13. 



June 

 25. 



July 

 9. 



July 

 31. 



Aug. 

 21. 



Sept. 

 4. 



Oct. 

 2. 



June 3 



0-003 



0-116 

















June 13 





0-052 

















June 25 







0-44 















July 9 









0-215 





... 









July 31 











0-66 











Aug. 21 









... 





0-573 









Sept. 4 









... 





... 



0*684 









Character l.cp.l. 



1914. 



June 

 13. 



June 

 25. 



July 

 9. 



July 

 31. 



Aug. 

 21. 



Sept. 

 4. 



Oct. 



2. 



June 3 



o-ooi 



0-044 

















June 13 





















June 25 







0-072 















July 9 









0-008 













July 31 





















Aug 21. .j 

















Sept. 4 











... | 











