ECOLOGY AND BIOLOGY OF THE PACIFIC WALRUS 



55 



Fig. 36. Dorsal view of a Pacific walrus fetus, about 6 months post-implantation (length 

 about 70 cm). The damp lanugo pelage lies in a rippled pattern, nearly flat against the 

 skin. Dark areas on the flippers are hairless. (Photo by F. H. Fay) 



as guard hairs and underfur. The dimensions and appearance of the hairs are 

 compared with those of the subsequent pelages in Table 8 and Figs. 37 and 38. 



Fig. 37. Comparative size and shape of 

 primary hairs of the lanugo (left), 

 1 mm natal (center), and adult (right) pelages 



of the Pacific walrus. Upper row, ante- 

 rior and lateral views of single hairs; 

 lower, cross -sectional shape, midway 

 of the blade. 



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