106 



NORTH AMERICAN FAUNA 74 



Fig. 71. Appearance of the tusks in free-living Pacific walruses at 0 (top). 1, 2, and 

 3 >ears of age (bottom): left, with facial flesh in place; center, in cleaned skulls; right, 

 closeup views. (Photos by F. H. Fay and G. C. Kelley) 



