THE ANATOMY OF A BIRD 



FIGS. 2, 3. (After Wray in ' Ibis ' for 1837.) 



B, Barbs ; bp, proximal barbules ; 1, flange ; 2, 'dog-tooth,' part of flange ; 

 3, overlapping portion. 



FIG. 4. POKTION OF TWO ADJACENT B.viu;s. (After Wray in ' Ibis ' for 1887.) 

 13, barbs ; bit, bp, barbules (distal and proximal). 



