i8g 3 . THE INTERLOCKING OF FEATHERS. 



199 



D R 



Section t/irough 2 rows parallel to t/ie distal Radii. 



MR. Distal Radio P. R ProxvnaZ RadiL 

 Sc. 



A 



F F, 'g- 3 - 



,R' 



Fig. I. 



A \ Uia<//rcnv 

 Ife of Feather. 



Proximal Radii. 



F Folded edgt. 



Fig. 4. 



A Distal Radius 



H. Hanudi or Roofvlcti. 

 C. Cilia, or Barbicels. 



Section, through tte bases 

 of 3 Distal Radii* 



Fig. 5. 



Fig- 6. 



Magnified Section through a 

 Hooklet and folded edge of 

 a Proximal Radius. 



F. Folded edge. 

 H. Hooklet 



Diagrams of Feather-barbs. 



