38 



NORTH AMERICAN FAUNA 68 



Figure 19. — Horizontal section through the sea otter skin showing deeper 

 layer, near hair roots, with one complete pelage unit. A — connective tissue, 

 B — sweat duct, C — sebaceous duct, D — sebaceous glands, E — large guard 

 hair, F — large underfur hair, G — smaller underfur hairs. (JKL photo) 



