EXTERNAL CHARACTERS OF BLUE WHALES 



319 



IV h. no. 4fi 



\Vh. no. 48 



Wh. no. 49 



Fig. 51. Mammary grooves, genital aperture, etc., of female Blue whales (semi-diagrammatic); to 

 show variation of the extra grooves in this region, m, mammary grooves. 



48 



14-1 



1 + 5 



1+7 





1+8 



55 



60 



2.7+ 



270 



27+ 



• •• 



Fi 



g. 52. Diagrams showing different arrangement of the hairs on the chin of seven and the rostrum of three 

 Blue whales. The beard in each case is sketched from a view immediately in front of the mouth, and 

 the rostral hairs from a dorsal aspect. The numerals refer to individual whales. 



