i6 THE SCOTTISH NATURALIST 



We see from all this (i) that the mean ratio of girth to 

 length is about 38 to 40 per cent. ; or (taking the figures as 

 they stand) the mean girth of a 60-feet whale would be about 

 23 feet for the males, and 23.9 feet for the females ; (2) the 

 difference in relative girth between males and females is 

 not very great, but constant, or very nearly so, throughout 

 our tables ; (3) the values tend to increase from the lower 

 quartiles to the medians, and again to the upper quartiles : 

 in other words, the larger whales have the greater relative 

 girth the girth tends to increase somewhat faster than the 

 length of the whale ; (4) on the whole there is a tendency, 

 not very regular but yet apparently unmistakable, for the 

 relative girth to increase month by month during the course 

 of the season; (5) the annual values are irregular, and there 

 is a considerable difference between the relative girths in 

 the different years ; as far as we can judge the whales of 

 1909 and 1910 seem to have been fatter than usual, and 

 those of 191 2 unusually lean. 



{^To be concluded.^ 



