EXTERNAL CHARACTERS OF BLUE WHALES 



319 



IVIi. no. 46 



m 



It'/;, no. 48 



Wh. no. 49 



wit. no 



III 



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

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



48 



l+l 



14-5 



1+7 



14-e 



55 



60 



174 



270 



274 



• • 



• •• 



Fig. 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. 



