SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 48, PL. VIII 
16 
14. Hook-bearing part or a hook-fiber of Turacus albocristatus, showing the spines of the proxi- 
mal hooks. Magnified 1:480 
15. Hook-bearing part of a hook-fiber of Cucudus canorus, showing the spines on the proximal 
hooks. Magnified 1:480 
16. Proximal portion of a hook-fiber of Cyfse/us apus, showing the cell boundaries and the swell- 
ing on the upper margin. Magnified 1:400 
