ECOLOGY AND BIOLOGY OF THE PACIFIC WALRUS 



115 



l.2r 



S Llh 



1.0 



0.9 



% 0.8 



0.7 



0.6 



• O 



o • 



o o 

 o 



10 20 30 40 50 60 

 Length Clinical Crown (cm) 



70 



Fig. 78. Ratio of cros.s-sectional diameter (long axis) of tusks at the gingival margin to 

 that at the root apex, in relation to length of the clinical crown in Pacific walruses. Each 

 point represents one male (dot) or female (circle). Dashed line indicates level of unity of 

 diameters. 



40r 



6 

 o 



- 30 



O 



§ 20 



o 



o 



10 



0 



J \ L 



0 10 20 30 40 50 60 70 80 

 Length Clinical Crown (cm) 



Fig. 79. Comparative stoutness of tusks of male (dots) and female (circles) Pacific wal- 

 ruses, in relation to length of the clinical crown. Each point represents one specimen. 



