SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 48, FL. IX 
17, 18, 19. Surface views of the upper side of a hand remex of Cyfse/us afus,, focussed at three dif- 
ferent levels. Magnified 1:270 
17 Highest level showing the terminal threads of the hook-fibers 
18. Middle level showing the proximal portions of the hook-fibers 
