308 



Appendices to Fifth Annual Report 



taken in a straight line to the perpendicular from its dorsal tip, and this 

 point undoubtedly varied somewhat from its natural position according to 

 the amount of its expansion. This source of error, however, would apply 

 to both winter and summer herrings. The relative length of the caudal 

 fin, as compared with the length of the head, will be seen further on. 

 The table (XXX.) of its ratio to the body length seems to show, however, 

 that the caudal fin increases in its relative length to the body, as the 

 body itself increases in length. 



The following tables show in numbers per cent, of the herrings, the 

 degree of frequency with which the combinations of the variable condi- 

 tions, as classified, of two characters occur. The ground of variation has 

 been, for convenience, reduced here from the more minutely divided tables 

 in which they were originally classified to four divisions, as these were 

 found to present similar, if less gradual results. 



TABLE XXXI., showing Percentage of Mature Herrings, arranged 

 according to the Combinations in which are found the Relative 

 Positions of the Dorsal and Anal Fins on the Body Length (less 

 Head and Caudal Fin). 



Ratio of Anal Fin 

 Position. 



Ratio of Dorsal Fin Position. 



Winter. 



Summer. 



•448 

 to 



•472 



•473 

 to 



•496 



•497 

 to 

 •520 



•521 



to 



•545 



•448 

 to 

 •472 



•473 



to 

 •496 



•497 

 to 



•520 



•521 



to 



•545 



•751 to -773 



% 

 3-5 



% 

 3-5 



% 

 4-2 



% 

 •4 



% 



% 

 3-3 



% 

 1-6 



% 



•774 to 795 



3-2 



23-8 



18-2 | 2-8 





5-0 



17-0 



•5 



•796 to -817 



•8 



15'2 



17-5 



3-5 





11-0 



34-3 



8-2 



•818 to '839 



•4 



•8 



•8 



1-4 





1-1 



13'5 



4*4 



TABLE XXXIL, showing Percentage of Mature Herrings, arranged 

 according to the Combinations in which are found the Relative 

 Position of the Dorsal Fin, and the Relative Length of the Head to 

 the Body Length (less Head and Caudal Fin). 





Ratio of Dorsal Fin Position. 



Ratio of Head 

 Length. 



Winter. 



Summer. 



•448 

 to 

 •472 



•473 

 to 



•496 



•497 

 to 



•520 



•521 



to 



•545 



•448 

 to 



•472 



•473 

 to 



•496 



•497 

 to 

 •520 



•521 

 to 



•545 



•147 to -176 



% 



% 

 8-4 



% 

 15-5 



% 

 3-8 



% 



% 

 27 



% 

 14-4 



% 

 6'2 



•177 to -206 



4-8 



33-5 



25-1 



3-8 





17'1 



49-1 



7-1 



•207 to -236 



•3 



2'8 



1-4 







1-4 



2-0 





•237 to "266 



•3 



•3 















